gitweb / gitweb.perlon commit add tests for rebasing root (6a6bc5b)
   1#!/usr/bin/perl
   2
   3# gitweb - simple web interface to track changes in git repositories
   4#
   5# (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6# (C) 2005, Christian Gierke
   7#
   8# This program is licensed under the GPLv2
   9
  10use 5.008;
  11use strict;
  12use warnings;
  13use CGI qw(:standard :escapeHTML -nosticky);
  14use CGI::Util qw(unescape);
  15use CGI::Carp qw(fatalsToBrowser set_message);
  16use Encode;
  17use Fcntl ':mode';
  18use File::Find qw();
  19use File::Basename qw(basename);
  20use Time::HiRes qw(gettimeofday tv_interval);
  21binmode STDOUT, ':utf8';
  22
  23our $t0 = [ gettimeofday() ];
  24our $number_of_git_cmds = 0;
  25
  26BEGIN {
  27        CGI->compile() if $ENV{'MOD_PERL'};
  28}
  29
  30our $version = "++GIT_VERSION++";
  31
  32our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  33sub evaluate_uri {
  34        our $cgi;
  35
  36        our $my_url = $cgi->url();
  37        our $my_uri = $cgi->url(-absolute => 1);
  38
  39        # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  40        # needed and used only for URLs with nonempty PATH_INFO
  41        our $base_url = $my_url;
  42
  43        # When the script is used as DirectoryIndex, the URL does not contain the name
  44        # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  45        # have to do it ourselves. We make $path_info global because it's also used
  46        # later on.
  47        #
  48        # Another issue with the script being the DirectoryIndex is that the resulting
  49        # $my_url data is not the full script URL: this is good, because we want
  50        # generated links to keep implying the script name if it wasn't explicitly
  51        # indicated in the URL we're handling, but it means that $my_url cannot be used
  52        # as base URL.
  53        # Therefore, if we needed to strip PATH_INFO, then we know that we have
  54        # to build the base URL ourselves:
  55        our $path_info = decode_utf8($ENV{"PATH_INFO"});
  56        if ($path_info) {
  57                # $path_info has already been URL-decoded by the web server, but
  58                # $my_url and $my_uri have not. URL-decode them so we can properly
  59                # strip $path_info.
  60                $my_url = unescape($my_url);
  61                $my_uri = unescape($my_uri);
  62                if ($my_url =~ s,\Q$path_info\E$,, &&
  63                    $my_uri =~ s,\Q$path_info\E$,, &&
  64                    defined $ENV{'SCRIPT_NAME'}) {
  65                        $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  66                }
  67        }
  68
  69        # target of the home link on top of all pages
  70        our $home_link = $my_uri || "/";
  71}
  72
  73# core git executable to use
  74# this can just be "git" if your webserver has a sensible PATH
  75our $GIT = "++GIT_BINDIR++/git";
  76
  77# absolute fs-path which will be prepended to the project path
  78#our $projectroot = "/pub/scm";
  79our $projectroot = "++GITWEB_PROJECTROOT++";
  80
  81# fs traversing limit for getting project list
  82# the number is relative to the projectroot
  83our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  84
  85# string of the home link on top of all pages
  86our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  87
  88# name of your site or organization to appear in page titles
  89# replace this with something more descriptive for clearer bookmarks
  90our $site_name = "++GITWEB_SITENAME++"
  91                 || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  92
  93# html snippet to include in the <head> section of each page
  94our $site_html_head_string = "++GITWEB_SITE_HTML_HEAD_STRING++";
  95# filename of html text to include at top of each page
  96our $site_header = "++GITWEB_SITE_HEADER++";
  97# html text to include at home page
  98our $home_text = "++GITWEB_HOMETEXT++";
  99# filename of html text to include at bottom of each page
 100our $site_footer = "++GITWEB_SITE_FOOTER++";
 101
 102# URI of stylesheets
 103our @stylesheets = ("++GITWEB_CSS++");
 104# URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
 105our $stylesheet = undef;
 106# URI of GIT logo (72x27 size)
 107our $logo = "++GITWEB_LOGO++";
 108# URI of GIT favicon, assumed to be image/png type
 109our $favicon = "++GITWEB_FAVICON++";
 110# URI of gitweb.js (JavaScript code for gitweb)
 111our $javascript = "++GITWEB_JS++";
 112
 113# URI and label (title) of GIT logo link
 114#our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 115#our $logo_label = "git documentation";
 116our $logo_url = "http://git-scm.com/";
 117our $logo_label = "git homepage";
 118
 119# source of projects list
 120our $projects_list = "++GITWEB_LIST++";
 121
 122# the width (in characters) of the projects list "Description" column
 123our $projects_list_description_width = 25;
 124
 125# group projects by category on the projects list
 126# (enabled if this variable evaluates to true)
 127our $projects_list_group_categories = 0;
 128
 129# default category if none specified
 130# (leave the empty string for no category)
 131our $project_list_default_category = "";
 132
 133# default order of projects list
 134# valid values are none, project, descr, owner, and age
 135our $default_projects_order = "project";
 136
 137# show repository only if this file exists
 138# (only effective if this variable evaluates to true)
 139our $export_ok = "++GITWEB_EXPORT_OK++";
 140
 141# don't generate age column on the projects list page
 142our $omit_age_column = 0;
 143
 144# don't generate information about owners of repositories
 145our $omit_owner=0;
 146
 147# show repository only if this subroutine returns true
 148# when given the path to the project, for example:
 149#    sub { return -e "$_[0]/git-daemon-export-ok"; }
 150our $export_auth_hook = undef;
 151
 152# only allow viewing of repositories also shown on the overview page
 153our $strict_export = "++GITWEB_STRICT_EXPORT++";
 154
 155# list of git base URLs used for URL to where fetch project from,
 156# i.e. full URL is "$git_base_url/$project"
 157our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 158
 159# default blob_plain mimetype and default charset for text/plain blob
 160our $default_blob_plain_mimetype = 'text/plain';
 161our $default_text_plain_charset  = undef;
 162
 163# file to use for guessing MIME types before trying /etc/mime.types
 164# (relative to the current git repository)
 165our $mimetypes_file = undef;
 166
 167# assume this charset if line contains non-UTF-8 characters;
 168# it should be valid encoding (see Encoding::Supported(3pm) for list),
 169# for which encoding all byte sequences are valid, for example
 170# 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 171# could be even 'utf-8' for the old behavior)
 172our $fallback_encoding = 'latin1';
 173
 174# rename detection options for git-diff and git-diff-tree
 175# - default is '-M', with the cost proportional to
 176#   (number of removed files) * (number of new files).
 177# - more costly is '-C' (which implies '-M'), with the cost proportional to
 178#   (number of changed files + number of removed files) * (number of new files)
 179# - even more costly is '-C', '--find-copies-harder' with cost
 180#   (number of files in the original tree) * (number of new files)
 181# - one might want to include '-B' option, e.g. '-B', '-M'
 182our @diff_opts = ('-M'); # taken from git_commit
 183
 184# Disables features that would allow repository owners to inject script into
 185# the gitweb domain.
 186our $prevent_xss = 0;
 187
 188# Path to the highlight executable to use (must be the one from
 189# http://www.andre-simon.de due to assumptions about parameters and output).
 190# Useful if highlight is not installed on your webserver's PATH.
 191# [Default: highlight]
 192our $highlight_bin = "++HIGHLIGHT_BIN++";
 193
 194# information about snapshot formats that gitweb is capable of serving
 195our %known_snapshot_formats = (
 196        # name => {
 197        #       'display' => display name,
 198        #       'type' => mime type,
 199        #       'suffix' => filename suffix,
 200        #       'format' => --format for git-archive,
 201        #       'compressor' => [compressor command and arguments]
 202        #                       (array reference, optional)
 203        #       'disabled' => boolean (optional)}
 204        #
 205        'tgz' => {
 206                'display' => 'tar.gz',
 207                'type' => 'application/x-gzip',
 208                'suffix' => '.tar.gz',
 209                'format' => 'tar',
 210                'compressor' => ['gzip', '-n']},
 211
 212        'tbz2' => {
 213                'display' => 'tar.bz2',
 214                'type' => 'application/x-bzip2',
 215                'suffix' => '.tar.bz2',
 216                'format' => 'tar',
 217                'compressor' => ['bzip2']},
 218
 219        'txz' => {
 220                'display' => 'tar.xz',
 221                'type' => 'application/x-xz',
 222                'suffix' => '.tar.xz',
 223                'format' => 'tar',
 224                'compressor' => ['xz'],
 225                'disabled' => 1},
 226
 227        'zip' => {
 228                'display' => 'zip',
 229                'type' => 'application/x-zip',
 230                'suffix' => '.zip',
 231                'format' => 'zip'},
 232);
 233
 234# Aliases so we understand old gitweb.snapshot values in repository
 235# configuration.
 236our %known_snapshot_format_aliases = (
 237        'gzip'  => 'tgz',
 238        'bzip2' => 'tbz2',
 239        'xz'    => 'txz',
 240
 241        # backward compatibility: legacy gitweb config support
 242        'x-gzip' => undef, 'gz' => undef,
 243        'x-bzip2' => undef, 'bz2' => undef,
 244        'x-zip' => undef, '' => undef,
 245);
 246
 247# Pixel sizes for icons and avatars. If the default font sizes or lineheights
 248# are changed, it may be appropriate to change these values too via
 249# $GITWEB_CONFIG.
 250our %avatar_size = (
 251        'default' => 16,
 252        'double'  => 32
 253);
 254
 255# Used to set the maximum load that we will still respond to gitweb queries.
 256# If server load exceed this value then return "503 server busy" error.
 257# If gitweb cannot determined server load, it is taken to be 0.
 258# Leave it undefined (or set to 'undef') to turn off load checking.
 259our $maxload = 300;
 260
 261# configuration for 'highlight' (http://www.andre-simon.de/)
 262# match by basename
 263our %highlight_basename = (
 264        #'Program' => 'py',
 265        #'Library' => 'py',
 266        'SConstruct' => 'py', # SCons equivalent of Makefile
 267        'Makefile' => 'make',
 268);
 269# match by extension
 270our %highlight_ext = (
 271        # main extensions, defining name of syntax;
 272        # see files in /usr/share/highlight/langDefs/ directory
 273        (map { $_ => $_ } qw(py rb java css js tex bib xml awk bat ini spec tcl sql)),
 274        # alternate extensions, see /etc/highlight/filetypes.conf
 275        (map { $_ => 'c'   } qw(c h)),
 276        (map { $_ => 'sh'  } qw(sh bash zsh ksh)),
 277        (map { $_ => 'cpp' } qw(cpp cxx c++ cc)),
 278        (map { $_ => 'php' } qw(php php3 php4 php5 phps)),
 279        (map { $_ => 'pl'  } qw(pl perl pm)), # perhaps also 'cgi'
 280        (map { $_ => 'make'} qw(make mak mk)),
 281        (map { $_ => 'xml' } qw(xml xhtml html htm)),
 282);
 283
 284# You define site-wide feature defaults here; override them with
 285# $GITWEB_CONFIG as necessary.
 286our %feature = (
 287        # feature => {
 288        #       'sub' => feature-sub (subroutine),
 289        #       'override' => allow-override (boolean),
 290        #       'default' => [ default options...] (array reference)}
 291        #
 292        # if feature is overridable (it means that allow-override has true value),
 293        # then feature-sub will be called with default options as parameters;
 294        # return value of feature-sub indicates if to enable specified feature
 295        #
 296        # if there is no 'sub' key (no feature-sub), then feature cannot be
 297        # overridden
 298        #
 299        # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 300        # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 301        # is enabled
 302
 303        # Enable the 'blame' blob view, showing the last commit that modified
 304        # each line in the file. This can be very CPU-intensive.
 305
 306        # To enable system wide have in $GITWEB_CONFIG
 307        # $feature{'blame'}{'default'} = [1];
 308        # To have project specific config enable override in $GITWEB_CONFIG
 309        # $feature{'blame'}{'override'} = 1;
 310        # and in project config gitweb.blame = 0|1;
 311        'blame' => {
 312                'sub' => sub { feature_bool('blame', @_) },
 313                'override' => 0,
 314                'default' => [0]},
 315
 316        # Enable the 'snapshot' link, providing a compressed archive of any
 317        # tree. This can potentially generate high traffic if you have large
 318        # project.
 319
 320        # Value is a list of formats defined in %known_snapshot_formats that
 321        # you wish to offer.
 322        # To disable system wide have in $GITWEB_CONFIG
 323        # $feature{'snapshot'}{'default'} = [];
 324        # To have project specific config enable override in $GITWEB_CONFIG
 325        # $feature{'snapshot'}{'override'} = 1;
 326        # and in project config, a comma-separated list of formats or "none"
 327        # to disable.  Example: gitweb.snapshot = tbz2,zip;
 328        'snapshot' => {
 329                'sub' => \&feature_snapshot,
 330                'override' => 0,
 331                'default' => ['tgz']},
 332
 333        # Enable text search, which will list the commits which match author,
 334        # committer or commit text to a given string.  Enabled by default.
 335        # Project specific override is not supported.
 336        #
 337        # Note that this controls all search features, which means that if
 338        # it is disabled, then 'grep' and 'pickaxe' search would also be
 339        # disabled.
 340        'search' => {
 341                'override' => 0,
 342                'default' => [1]},
 343
 344        # Enable grep search, which will list the files in currently selected
 345        # tree containing the given string. Enabled by default. This can be
 346        # potentially CPU-intensive, of course.
 347        # Note that you need to have 'search' feature enabled too.
 348
 349        # To enable system wide have in $GITWEB_CONFIG
 350        # $feature{'grep'}{'default'} = [1];
 351        # To have project specific config enable override in $GITWEB_CONFIG
 352        # $feature{'grep'}{'override'} = 1;
 353        # and in project config gitweb.grep = 0|1;
 354        'grep' => {
 355                'sub' => sub { feature_bool('grep', @_) },
 356                'override' => 0,
 357                'default' => [1]},
 358
 359        # Enable the pickaxe search, which will list the commits that modified
 360        # a given string in a file. This can be practical and quite faster
 361        # alternative to 'blame', but still potentially CPU-intensive.
 362        # Note that you need to have 'search' feature enabled too.
 363
 364        # To enable system wide have in $GITWEB_CONFIG
 365        # $feature{'pickaxe'}{'default'} = [1];
 366        # To have project specific config enable override in $GITWEB_CONFIG
 367        # $feature{'pickaxe'}{'override'} = 1;
 368        # and in project config gitweb.pickaxe = 0|1;
 369        'pickaxe' => {
 370                'sub' => sub { feature_bool('pickaxe', @_) },
 371                'override' => 0,
 372                'default' => [1]},
 373
 374        # Enable showing size of blobs in a 'tree' view, in a separate
 375        # column, similar to what 'ls -l' does.  This cost a bit of IO.
 376
 377        # To disable system wide have in $GITWEB_CONFIG
 378        # $feature{'show-sizes'}{'default'} = [0];
 379        # To have project specific config enable override in $GITWEB_CONFIG
 380        # $feature{'show-sizes'}{'override'} = 1;
 381        # and in project config gitweb.showsizes = 0|1;
 382        'show-sizes' => {
 383                'sub' => sub { feature_bool('showsizes', @_) },
 384                'override' => 0,
 385                'default' => [1]},
 386
 387        # Make gitweb use an alternative format of the URLs which can be
 388        # more readable and natural-looking: project name is embedded
 389        # directly in the path and the query string contains other
 390        # auxiliary information. All gitweb installations recognize
 391        # URL in either format; this configures in which formats gitweb
 392        # generates links.
 393
 394        # To enable system wide have in $GITWEB_CONFIG
 395        # $feature{'pathinfo'}{'default'} = [1];
 396        # Project specific override is not supported.
 397
 398        # Note that you will need to change the default location of CSS,
 399        # favicon, logo and possibly other files to an absolute URL. Also,
 400        # if gitweb.cgi serves as your indexfile, you will need to force
 401        # $my_uri to contain the script name in your $GITWEB_CONFIG.
 402        'pathinfo' => {
 403                'override' => 0,
 404                'default' => [0]},
 405
 406        # Make gitweb consider projects in project root subdirectories
 407        # to be forks of existing projects. Given project $projname.git,
 408        # projects matching $projname/*.git will not be shown in the main
 409        # projects list, instead a '+' mark will be added to $projname
 410        # there and a 'forks' view will be enabled for the project, listing
 411        # all the forks. If project list is taken from a file, forks have
 412        # to be listed after the main project.
 413
 414        # To enable system wide have in $GITWEB_CONFIG
 415        # $feature{'forks'}{'default'} = [1];
 416        # Project specific override is not supported.
 417        'forks' => {
 418                'override' => 0,
 419                'default' => [0]},
 420
 421        # Insert custom links to the action bar of all project pages.
 422        # This enables you mainly to link to third-party scripts integrating
 423        # into gitweb; e.g. git-browser for graphical history representation
 424        # or custom web-based repository administration interface.
 425
 426        # The 'default' value consists of a list of triplets in the form
 427        # (label, link, position) where position is the label after which
 428        # to insert the link and link is a format string where %n expands
 429        # to the project name, %f to the project path within the filesystem,
 430        # %h to the current hash (h gitweb parameter) and %b to the current
 431        # hash base (hb gitweb parameter); %% expands to %.
 432
 433        # To enable system wide have in $GITWEB_CONFIG e.g.
 434        # $feature{'actions'}{'default'} = [('graphiclog',
 435        #       '/git-browser/by-commit.html?r=%n', 'summary')];
 436        # Project specific override is not supported.
 437        'actions' => {
 438                'override' => 0,
 439                'default' => []},
 440
 441        # Allow gitweb scan project content tags of project repository,
 442        # and display the popular Web 2.0-ish "tag cloud" near the projects
 443        # list.  Note that this is something COMPLETELY different from the
 444        # normal Git tags.
 445
 446        # gitweb by itself can show existing tags, but it does not handle
 447        # tagging itself; you need to do it externally, outside gitweb.
 448        # The format is described in git_get_project_ctags() subroutine.
 449        # You may want to install the HTML::TagCloud Perl module to get
 450        # a pretty tag cloud instead of just a list of tags.
 451
 452        # To enable system wide have in $GITWEB_CONFIG
 453        # $feature{'ctags'}{'default'} = [1];
 454        # Project specific override is not supported.
 455
 456        # In the future whether ctags editing is enabled might depend
 457        # on the value, but using 1 should always mean no editing of ctags.
 458        'ctags' => {
 459                'override' => 0,
 460                'default' => [0]},
 461
 462        # The maximum number of patches in a patchset generated in patch
 463        # view. Set this to 0 or undef to disable patch view, or to a
 464        # negative number to remove any limit.
 465
 466        # To disable system wide have in $GITWEB_CONFIG
 467        # $feature{'patches'}{'default'} = [0];
 468        # To have project specific config enable override in $GITWEB_CONFIG
 469        # $feature{'patches'}{'override'} = 1;
 470        # and in project config gitweb.patches = 0|n;
 471        # where n is the maximum number of patches allowed in a patchset.
 472        'patches' => {
 473                'sub' => \&feature_patches,
 474                'override' => 0,
 475                'default' => [16]},
 476
 477        # Avatar support. When this feature is enabled, views such as
 478        # shortlog or commit will display an avatar associated with
 479        # the email of the committer(s) and/or author(s).
 480
 481        # Currently available providers are gravatar and picon.
 482        # If an unknown provider is specified, the feature is disabled.
 483
 484        # Gravatar depends on Digest::MD5.
 485        # Picon currently relies on the indiana.edu database.
 486
 487        # To enable system wide have in $GITWEB_CONFIG
 488        # $feature{'avatar'}{'default'} = ['<provider>'];
 489        # where <provider> is either gravatar or picon.
 490        # To have project specific config enable override in $GITWEB_CONFIG
 491        # $feature{'avatar'}{'override'} = 1;
 492        # and in project config gitweb.avatar = <provider>;
 493        'avatar' => {
 494                'sub' => \&feature_avatar,
 495                'override' => 0,
 496                'default' => ['']},
 497
 498        # Enable displaying how much time and how many git commands
 499        # it took to generate and display page.  Disabled by default.
 500        # Project specific override is not supported.
 501        'timed' => {
 502                'override' => 0,
 503                'default' => [0]},
 504
 505        # Enable turning some links into links to actions which require
 506        # JavaScript to run (like 'blame_incremental').  Not enabled by
 507        # default.  Project specific override is currently not supported.
 508        'javascript-actions' => {
 509                'override' => 0,
 510                'default' => [0]},
 511
 512        # Enable and configure ability to change common timezone for dates
 513        # in gitweb output via JavaScript.  Enabled by default.
 514        # Project specific override is not supported.
 515        'javascript-timezone' => {
 516                'override' => 0,
 517                'default' => [
 518                        'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 519                                     # or undef to turn off this feature
 520                        'gitweb_tz', # name of cookie where to store selected timezone
 521                        'datetime',  # CSS class used to mark up dates for manipulation
 522                ]},
 523
 524        # Syntax highlighting support. This is based on Daniel Svensson's
 525        # and Sham Chukoury's work in gitweb-xmms2.git.
 526        # It requires the 'highlight' program present in $PATH,
 527        # and therefore is disabled by default.
 528
 529        # To enable system wide have in $GITWEB_CONFIG
 530        # $feature{'highlight'}{'default'} = [1];
 531
 532        'highlight' => {
 533                'sub' => sub { feature_bool('highlight', @_) },
 534                'override' => 0,
 535                'default' => [0]},
 536
 537        # Enable displaying of remote heads in the heads list
 538
 539        # To enable system wide have in $GITWEB_CONFIG
 540        # $feature{'remote_heads'}{'default'} = [1];
 541        # To have project specific config enable override in $GITWEB_CONFIG
 542        # $feature{'remote_heads'}{'override'} = 1;
 543        # and in project config gitweb.remoteheads = 0|1;
 544        'remote_heads' => {
 545                'sub' => sub { feature_bool('remote_heads', @_) },
 546                'override' => 0,
 547                'default' => [0]},
 548);
 549
 550sub gitweb_get_feature {
 551        my ($name) = @_;
 552        return unless exists $feature{$name};
 553        my ($sub, $override, @defaults) = (
 554                $feature{$name}{'sub'},
 555                $feature{$name}{'override'},
 556                @{$feature{$name}{'default'}});
 557        # project specific override is possible only if we have project
 558        our $git_dir; # global variable, declared later
 559        if (!$override || !defined $git_dir) {
 560                return @defaults;
 561        }
 562        if (!defined $sub) {
 563                warn "feature $name is not overridable";
 564                return @defaults;
 565        }
 566        return $sub->(@defaults);
 567}
 568
 569# A wrapper to check if a given feature is enabled.
 570# With this, you can say
 571#
 572#   my $bool_feat = gitweb_check_feature('bool_feat');
 573#   gitweb_check_feature('bool_feat') or somecode;
 574#
 575# instead of
 576#
 577#   my ($bool_feat) = gitweb_get_feature('bool_feat');
 578#   (gitweb_get_feature('bool_feat'))[0] or somecode;
 579#
 580sub gitweb_check_feature {
 581        return (gitweb_get_feature(@_))[0];
 582}
 583
 584
 585sub feature_bool {
 586        my $key = shift;
 587        my ($val) = git_get_project_config($key, '--bool');
 588
 589        if (!defined $val) {
 590                return ($_[0]);
 591        } elsif ($val eq 'true') {
 592                return (1);
 593        } elsif ($val eq 'false') {
 594                return (0);
 595        }
 596}
 597
 598sub feature_snapshot {
 599        my (@fmts) = @_;
 600
 601        my ($val) = git_get_project_config('snapshot');
 602
 603        if ($val) {
 604                @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 605        }
 606
 607        return @fmts;
 608}
 609
 610sub feature_patches {
 611        my @val = (git_get_project_config('patches', '--int'));
 612
 613        if (@val) {
 614                return @val;
 615        }
 616
 617        return ($_[0]);
 618}
 619
 620sub feature_avatar {
 621        my @val = (git_get_project_config('avatar'));
 622
 623        return @val ? @val : @_;
 624}
 625
 626# checking HEAD file with -e is fragile if the repository was
 627# initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 628# and then pruned.
 629sub check_head_link {
 630        my ($dir) = @_;
 631        my $headfile = "$dir/HEAD";
 632        return ((-e $headfile) ||
 633                (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 634}
 635
 636sub check_export_ok {
 637        my ($dir) = @_;
 638        return (check_head_link($dir) &&
 639                (!$export_ok || -e "$dir/$export_ok") &&
 640                (!$export_auth_hook || $export_auth_hook->($dir)));
 641}
 642
 643# process alternate names for backward compatibility
 644# filter out unsupported (unknown) snapshot formats
 645sub filter_snapshot_fmts {
 646        my @fmts = @_;
 647
 648        @fmts = map {
 649                exists $known_snapshot_format_aliases{$_} ?
 650                       $known_snapshot_format_aliases{$_} : $_} @fmts;
 651        @fmts = grep {
 652                exists $known_snapshot_formats{$_} &&
 653                !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 654}
 655
 656# If it is set to code reference, it is code that it is to be run once per
 657# request, allowing updating configurations that change with each request,
 658# while running other code in config file only once.
 659#
 660# Otherwise, if it is false then gitweb would process config file only once;
 661# if it is true then gitweb config would be run for each request.
 662our $per_request_config = 1;
 663
 664# read and parse gitweb config file given by its parameter.
 665# returns true on success, false on recoverable error, allowing
 666# to chain this subroutine, using first file that exists.
 667# dies on errors during parsing config file, as it is unrecoverable.
 668sub read_config_file {
 669        my $filename = shift;
 670        return unless defined $filename;
 671        # die if there are errors parsing config file
 672        if (-e $filename) {
 673                do $filename;
 674                die $@ if $@;
 675                return 1;
 676        }
 677        return;
 678}
 679
 680our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
 681sub evaluate_gitweb_config {
 682        our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 683        our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 684        our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
 685
 686        # Protect against duplications of file names, to not read config twice.
 687        # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
 688        # there possibility of duplication of filename there doesn't matter.
 689        $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
 690        $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
 691
 692        # Common system-wide settings for convenience.
 693        # Those settings can be ovverriden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
 694        read_config_file($GITWEB_CONFIG_COMMON);
 695
 696        # Use first config file that exists.  This means use the per-instance
 697        # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
 698        read_config_file($GITWEB_CONFIG) and return;
 699        read_config_file($GITWEB_CONFIG_SYSTEM);
 700}
 701
 702# Get loadavg of system, to compare against $maxload.
 703# Currently it requires '/proc/loadavg' present to get loadavg;
 704# if it is not present it returns 0, which means no load checking.
 705sub get_loadavg {
 706        if( -e '/proc/loadavg' ){
 707                open my $fd, '<', '/proc/loadavg'
 708                        or return 0;
 709                my @load = split(/\s+/, scalar <$fd>);
 710                close $fd;
 711
 712                # The first three columns measure CPU and IO utilization of the last one,
 713                # five, and 10 minute periods.  The fourth column shows the number of
 714                # currently running processes and the total number of processes in the m/n
 715                # format.  The last column displays the last process ID used.
 716                return $load[0] || 0;
 717        }
 718        # additional checks for load average should go here for things that don't export
 719        # /proc/loadavg
 720
 721        return 0;
 722}
 723
 724# version of the core git binary
 725our $git_version;
 726sub evaluate_git_version {
 727        our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 728        $number_of_git_cmds++;
 729}
 730
 731sub check_loadavg {
 732        if (defined $maxload && get_loadavg() > $maxload) {
 733                die_error(503, "The load average on the server is too high");
 734        }
 735}
 736
 737# ======================================================================
 738# input validation and dispatch
 739
 740# input parameters can be collected from a variety of sources (presently, CGI
 741# and PATH_INFO), so we define an %input_params hash that collects them all
 742# together during validation: this allows subsequent uses (e.g. href()) to be
 743# agnostic of the parameter origin
 744
 745our %input_params = ();
 746
 747# input parameters are stored with the long parameter name as key. This will
 748# also be used in the href subroutine to convert parameters to their CGI
 749# equivalent, and since the href() usage is the most frequent one, we store
 750# the name -> CGI key mapping here, instead of the reverse.
 751#
 752# XXX: Warning: If you touch this, check the search form for updating,
 753# too.
 754
 755our @cgi_param_mapping = (
 756        project => "p",
 757        action => "a",
 758        file_name => "f",
 759        file_parent => "fp",
 760        hash => "h",
 761        hash_parent => "hp",
 762        hash_base => "hb",
 763        hash_parent_base => "hpb",
 764        page => "pg",
 765        order => "o",
 766        searchtext => "s",
 767        searchtype => "st",
 768        snapshot_format => "sf",
 769        extra_options => "opt",
 770        search_use_regexp => "sr",
 771        ctag => "by_tag",
 772        diff_style => "ds",
 773        project_filter => "pf",
 774        # this must be last entry (for manipulation from JavaScript)
 775        javascript => "js"
 776);
 777our %cgi_param_mapping = @cgi_param_mapping;
 778
 779# we will also need to know the possible actions, for validation
 780our %actions = (
 781        "blame" => \&git_blame,
 782        "blame_incremental" => \&git_blame_incremental,
 783        "blame_data" => \&git_blame_data,
 784        "blobdiff" => \&git_blobdiff,
 785        "blobdiff_plain" => \&git_blobdiff_plain,
 786        "blob" => \&git_blob,
 787        "blob_plain" => \&git_blob_plain,
 788        "commitdiff" => \&git_commitdiff,
 789        "commitdiff_plain" => \&git_commitdiff_plain,
 790        "commit" => \&git_commit,
 791        "forks" => \&git_forks,
 792        "heads" => \&git_heads,
 793        "history" => \&git_history,
 794        "log" => \&git_log,
 795        "patch" => \&git_patch,
 796        "patches" => \&git_patches,
 797        "remotes" => \&git_remotes,
 798        "rss" => \&git_rss,
 799        "atom" => \&git_atom,
 800        "search" => \&git_search,
 801        "search_help" => \&git_search_help,
 802        "shortlog" => \&git_shortlog,
 803        "summary" => \&git_summary,
 804        "tag" => \&git_tag,
 805        "tags" => \&git_tags,
 806        "tree" => \&git_tree,
 807        "snapshot" => \&git_snapshot,
 808        "object" => \&git_object,
 809        # those below don't need $project
 810        "opml" => \&git_opml,
 811        "project_list" => \&git_project_list,
 812        "project_index" => \&git_project_index,
 813);
 814
 815# finally, we have the hash of allowed extra_options for the commands that
 816# allow them
 817our %allowed_options = (
 818        "--no-merges" => [ qw(rss atom log shortlog history) ],
 819);
 820
 821# fill %input_params with the CGI parameters. All values except for 'opt'
 822# should be single values, but opt can be an array. We should probably
 823# build an array of parameters that can be multi-valued, but since for the time
 824# being it's only this one, we just single it out
 825sub evaluate_query_params {
 826        our $cgi;
 827
 828        while (my ($name, $symbol) = each %cgi_param_mapping) {
 829                if ($symbol eq 'opt') {
 830                        $input_params{$name} = [ map { decode_utf8($_) } $cgi->param($symbol) ];
 831                } else {
 832                        $input_params{$name} = decode_utf8($cgi->param($symbol));
 833                }
 834        }
 835}
 836
 837# now read PATH_INFO and update the parameter list for missing parameters
 838sub evaluate_path_info {
 839        return if defined $input_params{'project'};
 840        return if !$path_info;
 841        $path_info =~ s,^/+,,;
 842        return if !$path_info;
 843
 844        # find which part of PATH_INFO is project
 845        my $project = $path_info;
 846        $project =~ s,/+$,,;
 847        while ($project && !check_head_link("$projectroot/$project")) {
 848                $project =~ s,/*[^/]*$,,;
 849        }
 850        return unless $project;
 851        $input_params{'project'} = $project;
 852
 853        # do not change any parameters if an action is given using the query string
 854        return if $input_params{'action'};
 855        $path_info =~ s,^\Q$project\E/*,,;
 856
 857        # next, check if we have an action
 858        my $action = $path_info;
 859        $action =~ s,/.*$,,;
 860        if (exists $actions{$action}) {
 861                $path_info =~ s,^$action/*,,;
 862                $input_params{'action'} = $action;
 863        }
 864
 865        # list of actions that want hash_base instead of hash, but can have no
 866        # pathname (f) parameter
 867        my @wants_base = (
 868                'tree',
 869                'history',
 870        );
 871
 872        # we want to catch, among others
 873        # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 874        my ($parentrefname, $parentpathname, $refname, $pathname) =
 875                ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 876
 877        # first, analyze the 'current' part
 878        if (defined $pathname) {
 879                # we got "branch:filename" or "branch:dir/"
 880                # we could use git_get_type(branch:pathname), but:
 881                # - it needs $git_dir
 882                # - it does a git() call
 883                # - the convention of terminating directories with a slash
 884                #   makes it superfluous
 885                # - embedding the action in the PATH_INFO would make it even
 886                #   more superfluous
 887                $pathname =~ s,^/+,,;
 888                if (!$pathname || substr($pathname, -1) eq "/") {
 889                        $input_params{'action'} ||= "tree";
 890                        $pathname =~ s,/$,,;
 891                } else {
 892                        # the default action depends on whether we had parent info
 893                        # or not
 894                        if ($parentrefname) {
 895                                $input_params{'action'} ||= "blobdiff_plain";
 896                        } else {
 897                                $input_params{'action'} ||= "blob_plain";
 898                        }
 899                }
 900                $input_params{'hash_base'} ||= $refname;
 901                $input_params{'file_name'} ||= $pathname;
 902        } elsif (defined $refname) {
 903                # we got "branch". In this case we have to choose if we have to
 904                # set hash or hash_base.
 905                #
 906                # Most of the actions without a pathname only want hash to be
 907                # set, except for the ones specified in @wants_base that want
 908                # hash_base instead. It should also be noted that hand-crafted
 909                # links having 'history' as an action and no pathname or hash
 910                # set will fail, but that happens regardless of PATH_INFO.
 911                if (defined $parentrefname) {
 912                        # if there is parent let the default be 'shortlog' action
 913                        # (for http://git.example.com/repo.git/A..B links); if there
 914                        # is no parent, dispatch will detect type of object and set
 915                        # action appropriately if required (if action is not set)
 916                        $input_params{'action'} ||= "shortlog";
 917                }
 918                if ($input_params{'action'} &&
 919                    grep { $_ eq $input_params{'action'} } @wants_base) {
 920                        $input_params{'hash_base'} ||= $refname;
 921                } else {
 922                        $input_params{'hash'} ||= $refname;
 923                }
 924        }
 925
 926        # next, handle the 'parent' part, if present
 927        if (defined $parentrefname) {
 928                # a missing pathspec defaults to the 'current' filename, allowing e.g.
 929                # someproject/blobdiff/oldrev..newrev:/filename
 930                if ($parentpathname) {
 931                        $parentpathname =~ s,^/+,,;
 932                        $parentpathname =~ s,/$,,;
 933                        $input_params{'file_parent'} ||= $parentpathname;
 934                } else {
 935                        $input_params{'file_parent'} ||= $input_params{'file_name'};
 936                }
 937                # we assume that hash_parent_base is wanted if a path was specified,
 938                # or if the action wants hash_base instead of hash
 939                if (defined $input_params{'file_parent'} ||
 940                        grep { $_ eq $input_params{'action'} } @wants_base) {
 941                        $input_params{'hash_parent_base'} ||= $parentrefname;
 942                } else {
 943                        $input_params{'hash_parent'} ||= $parentrefname;
 944                }
 945        }
 946
 947        # for the snapshot action, we allow URLs in the form
 948        # $project/snapshot/$hash.ext
 949        # where .ext determines the snapshot and gets removed from the
 950        # passed $refname to provide the $hash.
 951        #
 952        # To be able to tell that $refname includes the format extension, we
 953        # require the following two conditions to be satisfied:
 954        # - the hash input parameter MUST have been set from the $refname part
 955        #   of the URL (i.e. they must be equal)
 956        # - the snapshot format MUST NOT have been defined already (e.g. from
 957        #   CGI parameter sf)
 958        # It's also useless to try any matching unless $refname has a dot,
 959        # so we check for that too
 960        if (defined $input_params{'action'} &&
 961                $input_params{'action'} eq 'snapshot' &&
 962                defined $refname && index($refname, '.') != -1 &&
 963                $refname eq $input_params{'hash'} &&
 964                !defined $input_params{'snapshot_format'}) {
 965                # We loop over the known snapshot formats, checking for
 966                # extensions. Allowed extensions are both the defined suffix
 967                # (which includes the initial dot already) and the snapshot
 968                # format key itself, with a prepended dot
 969                while (my ($fmt, $opt) = each %known_snapshot_formats) {
 970                        my $hash = $refname;
 971                        unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 972                                next;
 973                        }
 974                        my $sfx = $1;
 975                        # a valid suffix was found, so set the snapshot format
 976                        # and reset the hash parameter
 977                        $input_params{'snapshot_format'} = $fmt;
 978                        $input_params{'hash'} = $hash;
 979                        # we also set the format suffix to the one requested
 980                        # in the URL: this way a request for e.g. .tgz returns
 981                        # a .tgz instead of a .tar.gz
 982                        $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 983                        last;
 984                }
 985        }
 986}
 987
 988our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 989     $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 990     $searchtext, $search_regexp, $project_filter);
 991sub evaluate_and_validate_params {
 992        our $action = $input_params{'action'};
 993        if (defined $action) {
 994                if (!validate_action($action)) {
 995                        die_error(400, "Invalid action parameter");
 996                }
 997        }
 998
 999        # parameters which are pathnames
1000        our $project = $input_params{'project'};
1001        if (defined $project) {
1002                if (!validate_project($project)) {
1003                        undef $project;
1004                        die_error(404, "No such project");
1005                }
1006        }
1007
1008        our $project_filter = $input_params{'project_filter'};
1009        if (defined $project_filter) {
1010                if (!validate_pathname($project_filter)) {
1011                        die_error(404, "Invalid project_filter parameter");
1012                }
1013        }
1014
1015        our $file_name = $input_params{'file_name'};
1016        if (defined $file_name) {
1017                if (!validate_pathname($file_name)) {
1018                        die_error(400, "Invalid file parameter");
1019                }
1020        }
1021
1022        our $file_parent = $input_params{'file_parent'};
1023        if (defined $file_parent) {
1024                if (!validate_pathname($file_parent)) {
1025                        die_error(400, "Invalid file parent parameter");
1026                }
1027        }
1028
1029        # parameters which are refnames
1030        our $hash = $input_params{'hash'};
1031        if (defined $hash) {
1032                if (!validate_refname($hash)) {
1033                        die_error(400, "Invalid hash parameter");
1034                }
1035        }
1036
1037        our $hash_parent = $input_params{'hash_parent'};
1038        if (defined $hash_parent) {
1039                if (!validate_refname($hash_parent)) {
1040                        die_error(400, "Invalid hash parent parameter");
1041                }
1042        }
1043
1044        our $hash_base = $input_params{'hash_base'};
1045        if (defined $hash_base) {
1046                if (!validate_refname($hash_base)) {
1047                        die_error(400, "Invalid hash base parameter");
1048                }
1049        }
1050
1051        our @extra_options = @{$input_params{'extra_options'}};
1052        # @extra_options is always defined, since it can only be (currently) set from
1053        # CGI, and $cgi->param() returns the empty array in array context if the param
1054        # is not set
1055        foreach my $opt (@extra_options) {
1056                if (not exists $allowed_options{$opt}) {
1057                        die_error(400, "Invalid option parameter");
1058                }
1059                if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1060                        die_error(400, "Invalid option parameter for this action");
1061                }
1062        }
1063
1064        our $hash_parent_base = $input_params{'hash_parent_base'};
1065        if (defined $hash_parent_base) {
1066                if (!validate_refname($hash_parent_base)) {
1067                        die_error(400, "Invalid hash parent base parameter");
1068                }
1069        }
1070
1071        # other parameters
1072        our $page = $input_params{'page'};
1073        if (defined $page) {
1074                if ($page =~ m/[^0-9]/) {
1075                        die_error(400, "Invalid page parameter");
1076                }
1077        }
1078
1079        our $searchtype = $input_params{'searchtype'};
1080        if (defined $searchtype) {
1081                if ($searchtype =~ m/[^a-z]/) {
1082                        die_error(400, "Invalid searchtype parameter");
1083                }
1084        }
1085
1086        our $search_use_regexp = $input_params{'search_use_regexp'};
1087
1088        our $searchtext = $input_params{'searchtext'};
1089        our $search_regexp;
1090        if (defined $searchtext) {
1091                if (length($searchtext) < 2) {
1092                        die_error(403, "At least two characters are required for search parameter");
1093                }
1094                if ($search_use_regexp) {
1095                        $search_regexp = $searchtext;
1096                        if (!eval { qr/$search_regexp/; 1; }) {
1097                                (my $error = $@) =~ s/ at \S+ line \d+.*\n?//;
1098                                die_error(400, "Invalid search regexp '$search_regexp'",
1099                                          esc_html($error));
1100                        }
1101                } else {
1102                        $search_regexp = quotemeta $searchtext;
1103                }
1104        }
1105}
1106
1107# path to the current git repository
1108our $git_dir;
1109sub evaluate_git_dir {
1110        our $git_dir = "$projectroot/$project" if $project;
1111}
1112
1113our (@snapshot_fmts, $git_avatar);
1114sub configure_gitweb_features {
1115        # list of supported snapshot formats
1116        our @snapshot_fmts = gitweb_get_feature('snapshot');
1117        @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1118
1119        # check that the avatar feature is set to a known provider name,
1120        # and for each provider check if the dependencies are satisfied.
1121        # if the provider name is invalid or the dependencies are not met,
1122        # reset $git_avatar to the empty string.
1123        our ($git_avatar) = gitweb_get_feature('avatar');
1124        if ($git_avatar eq 'gravatar') {
1125                $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1126        } elsif ($git_avatar eq 'picon') {
1127                # no dependencies
1128        } else {
1129                $git_avatar = '';
1130        }
1131}
1132
1133# custom error handler: 'die <message>' is Internal Server Error
1134sub handle_errors_html {
1135        my $msg = shift; # it is already HTML escaped
1136
1137        # to avoid infinite loop where error occurs in die_error,
1138        # change handler to default handler, disabling handle_errors_html
1139        set_message("Error occurred when inside die_error:\n$msg");
1140
1141        # you cannot jump out of die_error when called as error handler;
1142        # the subroutine set via CGI::Carp::set_message is called _after_
1143        # HTTP headers are already written, so it cannot write them itself
1144        die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1145}
1146set_message(\&handle_errors_html);
1147
1148# dispatch
1149sub dispatch {
1150        if (!defined $action) {
1151                if (defined $hash) {
1152                        $action = git_get_type($hash);
1153                        $action or die_error(404, "Object does not exist");
1154                } elsif (defined $hash_base && defined $file_name) {
1155                        $action = git_get_type("$hash_base:$file_name");
1156                        $action or die_error(404, "File or directory does not exist");
1157                } elsif (defined $project) {
1158                        $action = 'summary';
1159                } else {
1160                        $action = 'project_list';
1161                }
1162        }
1163        if (!defined($actions{$action})) {
1164                die_error(400, "Unknown action");
1165        }
1166        if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1167            !$project) {
1168                die_error(400, "Project needed");
1169        }
1170        $actions{$action}->();
1171}
1172
1173sub reset_timer {
1174        our $t0 = [ gettimeofday() ]
1175                if defined $t0;
1176        our $number_of_git_cmds = 0;
1177}
1178
1179our $first_request = 1;
1180sub run_request {
1181        reset_timer();
1182
1183        evaluate_uri();
1184        if ($first_request) {
1185                evaluate_gitweb_config();
1186                evaluate_git_version();
1187        }
1188        if ($per_request_config) {
1189                if (ref($per_request_config) eq 'CODE') {
1190                        $per_request_config->();
1191                } elsif (!$first_request) {
1192                        evaluate_gitweb_config();
1193                }
1194        }
1195        check_loadavg();
1196
1197        # $projectroot and $projects_list might be set in gitweb config file
1198        $projects_list ||= $projectroot;
1199
1200        evaluate_query_params();
1201        evaluate_path_info();
1202        evaluate_and_validate_params();
1203        evaluate_git_dir();
1204
1205        configure_gitweb_features();
1206
1207        dispatch();
1208}
1209
1210our $is_last_request = sub { 1 };
1211our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1212our $CGI = 'CGI';
1213our $cgi;
1214sub configure_as_fcgi {
1215        require CGI::Fast;
1216        our $CGI = 'CGI::Fast';
1217
1218        my $request_number = 0;
1219        # let each child service 100 requests
1220        our $is_last_request = sub { ++$request_number > 100 };
1221}
1222sub evaluate_argv {
1223        my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1224        configure_as_fcgi()
1225                if $script_name =~ /\.fcgi$/;
1226
1227        return unless (@ARGV);
1228
1229        require Getopt::Long;
1230        Getopt::Long::GetOptions(
1231                'fastcgi|fcgi|f' => \&configure_as_fcgi,
1232                'nproc|n=i' => sub {
1233                        my ($arg, $val) = @_;
1234                        return unless eval { require FCGI::ProcManager; 1; };
1235                        my $proc_manager = FCGI::ProcManager->new({
1236                                n_processes => $val,
1237                        });
1238                        our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1239                        our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1240                        our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1241                },
1242        );
1243}
1244
1245sub run {
1246        evaluate_argv();
1247
1248        $first_request = 1;
1249        $pre_listen_hook->()
1250                if $pre_listen_hook;
1251
1252 REQUEST:
1253        while ($cgi = $CGI->new()) {
1254                $pre_dispatch_hook->()
1255                        if $pre_dispatch_hook;
1256
1257                run_request();
1258
1259                $post_dispatch_hook->()
1260                        if $post_dispatch_hook;
1261                $first_request = 0;
1262
1263                last REQUEST if ($is_last_request->());
1264        }
1265
1266 DONE_GITWEB:
1267        1;
1268}
1269
1270run();
1271
1272if (defined caller) {
1273        # wrapped in a subroutine processing requests,
1274        # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1275        return;
1276} else {
1277        # pure CGI script, serving single request
1278        exit;
1279}
1280
1281## ======================================================================
1282## action links
1283
1284# possible values of extra options
1285# -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1286# -replay => 1      - start from a current view (replay with modifications)
1287# -path_info => 0|1 - don't use/use path_info URL (if possible)
1288# -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1289sub href {
1290        my %params = @_;
1291        # default is to use -absolute url() i.e. $my_uri
1292        my $href = $params{-full} ? $my_url : $my_uri;
1293
1294        # implicit -replay, must be first of implicit params
1295        $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1296
1297        $params{'project'} = $project unless exists $params{'project'};
1298
1299        if ($params{-replay}) {
1300                while (my ($name, $symbol) = each %cgi_param_mapping) {
1301                        if (!exists $params{$name}) {
1302                                $params{$name} = $input_params{$name};
1303                        }
1304                }
1305        }
1306
1307        my $use_pathinfo = gitweb_check_feature('pathinfo');
1308        if (defined $params{'project'} &&
1309            (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1310                # try to put as many parameters as possible in PATH_INFO:
1311                #   - project name
1312                #   - action
1313                #   - hash_parent or hash_parent_base:/file_parent
1314                #   - hash or hash_base:/filename
1315                #   - the snapshot_format as an appropriate suffix
1316
1317                # When the script is the root DirectoryIndex for the domain,
1318                # $href here would be something like http://gitweb.example.com/
1319                # Thus, we strip any trailing / from $href, to spare us double
1320                # slashes in the final URL
1321                $href =~ s,/$,,;
1322
1323                # Then add the project name, if present
1324                $href .= "/".esc_path_info($params{'project'});
1325                delete $params{'project'};
1326
1327                # since we destructively absorb parameters, we keep this
1328                # boolean that remembers if we're handling a snapshot
1329                my $is_snapshot = $params{'action'} eq 'snapshot';
1330
1331                # Summary just uses the project path URL, any other action is
1332                # added to the URL
1333                if (defined $params{'action'}) {
1334                        $href .= "/".esc_path_info($params{'action'})
1335                                unless $params{'action'} eq 'summary';
1336                        delete $params{'action'};
1337                }
1338
1339                # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1340                # stripping nonexistent or useless pieces
1341                $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1342                        || $params{'hash_parent'} || $params{'hash'});
1343                if (defined $params{'hash_base'}) {
1344                        if (defined $params{'hash_parent_base'}) {
1345                                $href .= esc_path_info($params{'hash_parent_base'});
1346                                # skip the file_parent if it's the same as the file_name
1347                                if (defined $params{'file_parent'}) {
1348                                        if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1349                                                delete $params{'file_parent'};
1350                                        } elsif ($params{'file_parent'} !~ /\.\./) {
1351                                                $href .= ":/".esc_path_info($params{'file_parent'});
1352                                                delete $params{'file_parent'};
1353                                        }
1354                                }
1355                                $href .= "..";
1356                                delete $params{'hash_parent'};
1357                                delete $params{'hash_parent_base'};
1358                        } elsif (defined $params{'hash_parent'}) {
1359                                $href .= esc_path_info($params{'hash_parent'}). "..";
1360                                delete $params{'hash_parent'};
1361                        }
1362
1363                        $href .= esc_path_info($params{'hash_base'});
1364                        if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1365                                $href .= ":/".esc_path_info($params{'file_name'});
1366                                delete $params{'file_name'};
1367                        }
1368                        delete $params{'hash'};
1369                        delete $params{'hash_base'};
1370                } elsif (defined $params{'hash'}) {
1371                        $href .= esc_path_info($params{'hash'});
1372                        delete $params{'hash'};
1373                }
1374
1375                # If the action was a snapshot, we can absorb the
1376                # snapshot_format parameter too
1377                if ($is_snapshot) {
1378                        my $fmt = $params{'snapshot_format'};
1379                        # snapshot_format should always be defined when href()
1380                        # is called, but just in case some code forgets, we
1381                        # fall back to the default
1382                        $fmt ||= $snapshot_fmts[0];
1383                        $href .= $known_snapshot_formats{$fmt}{'suffix'};
1384                        delete $params{'snapshot_format'};
1385                }
1386        }
1387
1388        # now encode the parameters explicitly
1389        my @result = ();
1390        for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1391                my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1392                if (defined $params{$name}) {
1393                        if (ref($params{$name}) eq "ARRAY") {
1394                                foreach my $par (@{$params{$name}}) {
1395                                        push @result, $symbol . "=" . esc_param($par);
1396                                }
1397                        } else {
1398                                push @result, $symbol . "=" . esc_param($params{$name});
1399                        }
1400                }
1401        }
1402        $href .= "?" . join(';', @result) if scalar @result;
1403
1404        # final transformation: trailing spaces must be escaped (URI-encoded)
1405        $href =~ s/(\s+)$/CGI::escape($1)/e;
1406
1407        if ($params{-anchor}) {
1408                $href .= "#".esc_param($params{-anchor});
1409        }
1410
1411        return $href;
1412}
1413
1414
1415## ======================================================================
1416## validation, quoting/unquoting and escaping
1417
1418sub validate_action {
1419        my $input = shift || return undef;
1420        return undef unless exists $actions{$input};
1421        return $input;
1422}
1423
1424sub validate_project {
1425        my $input = shift || return undef;
1426        if (!validate_pathname($input) ||
1427                !(-d "$projectroot/$input") ||
1428                !check_export_ok("$projectroot/$input") ||
1429                ($strict_export && !project_in_list($input))) {
1430                return undef;
1431        } else {
1432                return $input;
1433        }
1434}
1435
1436sub validate_pathname {
1437        my $input = shift || return undef;
1438
1439        # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1440        # at the beginning, at the end, and between slashes.
1441        # also this catches doubled slashes
1442        if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1443                return undef;
1444        }
1445        # no null characters
1446        if ($input =~ m!\0!) {
1447                return undef;
1448        }
1449        return $input;
1450}
1451
1452sub validate_refname {
1453        my $input = shift || return undef;
1454
1455        # textual hashes are O.K.
1456        if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1457                return $input;
1458        }
1459        # it must be correct pathname
1460        $input = validate_pathname($input)
1461                or return undef;
1462        # restrictions on ref name according to git-check-ref-format
1463        if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1464                return undef;
1465        }
1466        return $input;
1467}
1468
1469# decode sequences of octets in utf8 into Perl's internal form,
1470# which is utf-8 with utf8 flag set if needed.  gitweb writes out
1471# in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1472sub to_utf8 {
1473        my $str = shift;
1474        return undef unless defined $str;
1475
1476        if (utf8::is_utf8($str) || utf8::decode($str)) {
1477                return $str;
1478        } else {
1479                return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1480        }
1481}
1482
1483# quote unsafe chars, but keep the slash, even when it's not
1484# correct, but quoted slashes look too horrible in bookmarks
1485sub esc_param {
1486        my $str = shift;
1487        return undef unless defined $str;
1488        $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1489        $str =~ s/ /\+/g;
1490        return $str;
1491}
1492
1493# the quoting rules for path_info fragment are slightly different
1494sub esc_path_info {
1495        my $str = shift;
1496        return undef unless defined $str;
1497
1498        # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1499        $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1500
1501        return $str;
1502}
1503
1504# quote unsafe chars in whole URL, so some characters cannot be quoted
1505sub esc_url {
1506        my $str = shift;
1507        return undef unless defined $str;
1508        $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1509        $str =~ s/ /\+/g;
1510        return $str;
1511}
1512
1513# quote unsafe characters in HTML attributes
1514sub esc_attr {
1515
1516        # for XHTML conformance escaping '"' to '&quot;' is not enough
1517        return esc_html(@_);
1518}
1519
1520# replace invalid utf8 character with SUBSTITUTION sequence
1521sub esc_html {
1522        my $str = shift;
1523        my %opts = @_;
1524
1525        return undef unless defined $str;
1526
1527        $str = to_utf8($str);
1528        $str = $cgi->escapeHTML($str);
1529        if ($opts{'-nbsp'}) {
1530                $str =~ s/ /&nbsp;/g;
1531        }
1532        $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1533        return $str;
1534}
1535
1536# quote control characters and escape filename to HTML
1537sub esc_path {
1538        my $str = shift;
1539        my %opts = @_;
1540
1541        return undef unless defined $str;
1542
1543        $str = to_utf8($str);
1544        $str = $cgi->escapeHTML($str);
1545        if ($opts{'-nbsp'}) {
1546                $str =~ s/ /&nbsp;/g;
1547        }
1548        $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1549        return $str;
1550}
1551
1552# Sanitize for use in XHTML + application/xml+xhtm (valid XML 1.0)
1553sub sanitize {
1554        my $str = shift;
1555
1556        return undef unless defined $str;
1557
1558        $str = to_utf8($str);
1559        $str =~ s|([[:cntrl:]])|(index("\t\n\r", $1) != -1 ? $1 : quot_cec($1))|eg;
1560        return $str;
1561}
1562
1563# Make control characters "printable", using character escape codes (CEC)
1564sub quot_cec {
1565        my $cntrl = shift;
1566        my %opts = @_;
1567        my %es = ( # character escape codes, aka escape sequences
1568                "\t" => '\t',   # tab            (HT)
1569                "\n" => '\n',   # line feed      (LF)
1570                "\r" => '\r',   # carrige return (CR)
1571                "\f" => '\f',   # form feed      (FF)
1572                "\b" => '\b',   # backspace      (BS)
1573                "\a" => '\a',   # alarm (bell)   (BEL)
1574                "\e" => '\e',   # escape         (ESC)
1575                "\013" => '\v', # vertical tab   (VT)
1576                "\000" => '\0', # nul character  (NUL)
1577        );
1578        my $chr = ( (exists $es{$cntrl})
1579                    ? $es{$cntrl}
1580                    : sprintf('\%2x', ord($cntrl)) );
1581        if ($opts{-nohtml}) {
1582                return $chr;
1583        } else {
1584                return "<span class=\"cntrl\">$chr</span>";
1585        }
1586}
1587
1588# Alternatively use unicode control pictures codepoints,
1589# Unicode "printable representation" (PR)
1590sub quot_upr {
1591        my $cntrl = shift;
1592        my %opts = @_;
1593
1594        my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1595        if ($opts{-nohtml}) {
1596                return $chr;
1597        } else {
1598                return "<span class=\"cntrl\">$chr</span>";
1599        }
1600}
1601
1602# git may return quoted and escaped filenames
1603sub unquote {
1604        my $str = shift;
1605
1606        sub unq {
1607                my $seq = shift;
1608                my %es = ( # character escape codes, aka escape sequences
1609                        't' => "\t",   # tab            (HT, TAB)
1610                        'n' => "\n",   # newline        (NL)
1611                        'r' => "\r",   # return         (CR)
1612                        'f' => "\f",   # form feed      (FF)
1613                        'b' => "\b",   # backspace      (BS)
1614                        'a' => "\a",   # alarm (bell)   (BEL)
1615                        'e' => "\e",   # escape         (ESC)
1616                        'v' => "\013", # vertical tab   (VT)
1617                );
1618
1619                if ($seq =~ m/^[0-7]{1,3}$/) {
1620                        # octal char sequence
1621                        return chr(oct($seq));
1622                } elsif (exists $es{$seq}) {
1623                        # C escape sequence, aka character escape code
1624                        return $es{$seq};
1625                }
1626                # quoted ordinary character
1627                return $seq;
1628        }
1629
1630        if ($str =~ m/^"(.*)"$/) {
1631                # needs unquoting
1632                $str = $1;
1633                $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1634        }
1635        return $str;
1636}
1637
1638# escape tabs (convert tabs to spaces)
1639sub untabify {
1640        my $line = shift;
1641
1642        while ((my $pos = index($line, "\t")) != -1) {
1643                if (my $count = (8 - ($pos % 8))) {
1644                        my $spaces = ' ' x $count;
1645                        $line =~ s/\t/$spaces/;
1646                }
1647        }
1648
1649        return $line;
1650}
1651
1652sub project_in_list {
1653        my $project = shift;
1654        my @list = git_get_projects_list();
1655        return @list && scalar(grep { $_->{'path'} eq $project } @list);
1656}
1657
1658## ----------------------------------------------------------------------
1659## HTML aware string manipulation
1660
1661# Try to chop given string on a word boundary between position
1662# $len and $len+$add_len. If there is no word boundary there,
1663# chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1664# (marking chopped part) would be longer than given string.
1665sub chop_str {
1666        my $str = shift;
1667        my $len = shift;
1668        my $add_len = shift || 10;
1669        my $where = shift || 'right'; # 'left' | 'center' | 'right'
1670
1671        # Make sure perl knows it is utf8 encoded so we don't
1672        # cut in the middle of a utf8 multibyte char.
1673        $str = to_utf8($str);
1674
1675        # allow only $len chars, but don't cut a word if it would fit in $add_len
1676        # if it doesn't fit, cut it if it's still longer than the dots we would add
1677        # remove chopped character entities entirely
1678
1679        # when chopping in the middle, distribute $len into left and right part
1680        # return early if chopping wouldn't make string shorter
1681        if ($where eq 'center') {
1682                return $str if ($len + 5 >= length($str)); # filler is length 5
1683                $len = int($len/2);
1684        } else {
1685                return $str if ($len + 4 >= length($str)); # filler is length 4
1686        }
1687
1688        # regexps: ending and beginning with word part up to $add_len
1689        my $endre = qr/.{$len}\w{0,$add_len}/;
1690        my $begre = qr/\w{0,$add_len}.{$len}/;
1691
1692        if ($where eq 'left') {
1693                $str =~ m/^(.*?)($begre)$/;
1694                my ($lead, $body) = ($1, $2);
1695                if (length($lead) > 4) {
1696                        $lead = " ...";
1697                }
1698                return "$lead$body";
1699
1700        } elsif ($where eq 'center') {
1701                $str =~ m/^($endre)(.*)$/;
1702                my ($left, $str)  = ($1, $2);
1703                $str =~ m/^(.*?)($begre)$/;
1704                my ($mid, $right) = ($1, $2);
1705                if (length($mid) > 5) {
1706                        $mid = " ... ";
1707                }
1708                return "$left$mid$right";
1709
1710        } else {
1711                $str =~ m/^($endre)(.*)$/;
1712                my $body = $1;
1713                my $tail = $2;
1714                if (length($tail) > 4) {
1715                        $tail = "... ";
1716                }
1717                return "$body$tail";
1718        }
1719}
1720
1721# takes the same arguments as chop_str, but also wraps a <span> around the
1722# result with a title attribute if it does get chopped. Additionally, the
1723# string is HTML-escaped.
1724sub chop_and_escape_str {
1725        my ($str) = @_;
1726
1727        my $chopped = chop_str(@_);
1728        $str = to_utf8($str);
1729        if ($chopped eq $str) {
1730                return esc_html($chopped);
1731        } else {
1732                $str =~ s/[[:cntrl:]]/?/g;
1733                return $cgi->span({-title=>$str}, esc_html($chopped));
1734        }
1735}
1736
1737# Highlight selected fragments of string, using given CSS class,
1738# and escape HTML.  It is assumed that fragments do not overlap.
1739# Regions are passed as list of pairs (array references).
1740#
1741# Example: esc_html_hl_regions("foobar", "mark", [ 0, 3 ]) returns
1742# '<span class="mark">foo</span>bar'
1743sub esc_html_hl_regions {
1744        my ($str, $css_class, @sel) = @_;
1745        my %opts = grep { ref($_) ne 'ARRAY' } @sel;
1746        @sel     = grep { ref($_) eq 'ARRAY' } @sel;
1747        return esc_html($str, %opts) unless @sel;
1748
1749        my $out = '';
1750        my $pos = 0;
1751
1752        for my $s (@sel) {
1753                my ($begin, $end) = @$s;
1754
1755                # Don't create empty <span> elements.
1756                next if $end <= $begin;
1757
1758                my $escaped = esc_html(substr($str, $begin, $end - $begin),
1759                                       %opts);
1760
1761                $out .= esc_html(substr($str, $pos, $begin - $pos), %opts)
1762                        if ($begin - $pos > 0);
1763                $out .= $cgi->span({-class => $css_class}, $escaped);
1764
1765                $pos = $end;
1766        }
1767        $out .= esc_html(substr($str, $pos), %opts)
1768                if ($pos < length($str));
1769
1770        return $out;
1771}
1772
1773# return positions of beginning and end of each match
1774sub matchpos_list {
1775        my ($str, $regexp) = @_;
1776        return unless (defined $str && defined $regexp);
1777
1778        my @matches;
1779        while ($str =~ /$regexp/g) {
1780                push @matches, [$-[0], $+[0]];
1781        }
1782        return @matches;
1783}
1784
1785# highlight match (if any), and escape HTML
1786sub esc_html_match_hl {
1787        my ($str, $regexp) = @_;
1788        return esc_html($str) unless defined $regexp;
1789
1790        my @matches = matchpos_list($str, $regexp);
1791        return esc_html($str) unless @matches;
1792
1793        return esc_html_hl_regions($str, 'match', @matches);
1794}
1795
1796
1797# highlight match (if any) of shortened string, and escape HTML
1798sub esc_html_match_hl_chopped {
1799        my ($str, $chopped, $regexp) = @_;
1800        return esc_html_match_hl($str, $regexp) unless defined $chopped;
1801
1802        my @matches = matchpos_list($str, $regexp);
1803        return esc_html($chopped) unless @matches;
1804
1805        # filter matches so that we mark chopped string
1806        my $tail = "... "; # see chop_str
1807        unless ($chopped =~ s/\Q$tail\E$//) {
1808                $tail = '';
1809        }
1810        my $chop_len = length($chopped);
1811        my $tail_len = length($tail);
1812        my @filtered;
1813
1814        for my $m (@matches) {
1815                if ($m->[0] > $chop_len) {
1816                        push @filtered, [ $chop_len, $chop_len + $tail_len ] if ($tail_len > 0);
1817                        last;
1818                } elsif ($m->[1] > $chop_len) {
1819                        push @filtered, [ $m->[0], $chop_len + $tail_len ];
1820                        last;
1821                }
1822                push @filtered, $m;
1823        }
1824
1825        return esc_html_hl_regions($chopped . $tail, 'match', @filtered);
1826}
1827
1828## ----------------------------------------------------------------------
1829## functions returning short strings
1830
1831# CSS class for given age value (in seconds)
1832sub age_class {
1833        my $age = shift;
1834
1835        if (!defined $age) {
1836                return "noage";
1837        } elsif ($age < 60*60*2) {
1838                return "age0";
1839        } elsif ($age < 60*60*24*2) {
1840                return "age1";
1841        } else {
1842                return "age2";
1843        }
1844}
1845
1846# convert age in seconds to "nn units ago" string
1847sub age_string {
1848        my $age = shift;
1849        my $age_str;
1850
1851        if ($age > 60*60*24*365*2) {
1852                $age_str = (int $age/60/60/24/365);
1853                $age_str .= " years ago";
1854        } elsif ($age > 60*60*24*(365/12)*2) {
1855                $age_str = int $age/60/60/24/(365/12);
1856                $age_str .= " months ago";
1857        } elsif ($age > 60*60*24*7*2) {
1858                $age_str = int $age/60/60/24/7;
1859                $age_str .= " weeks ago";
1860        } elsif ($age > 60*60*24*2) {
1861                $age_str = int $age/60/60/24;
1862                $age_str .= " days ago";
1863        } elsif ($age > 60*60*2) {
1864                $age_str = int $age/60/60;
1865                $age_str .= " hours ago";
1866        } elsif ($age > 60*2) {
1867                $age_str = int $age/60;
1868                $age_str .= " min ago";
1869        } elsif ($age > 2) {
1870                $age_str = int $age;
1871                $age_str .= " sec ago";
1872        } else {
1873                $age_str .= " right now";
1874        }
1875        return $age_str;
1876}
1877
1878use constant {
1879        S_IFINVALID => 0030000,
1880        S_IFGITLINK => 0160000,
1881};
1882
1883# submodule/subproject, a commit object reference
1884sub S_ISGITLINK {
1885        my $mode = shift;
1886
1887        return (($mode & S_IFMT) == S_IFGITLINK)
1888}
1889
1890# convert file mode in octal to symbolic file mode string
1891sub mode_str {
1892        my $mode = oct shift;
1893
1894        if (S_ISGITLINK($mode)) {
1895                return 'm---------';
1896        } elsif (S_ISDIR($mode & S_IFMT)) {
1897                return 'drwxr-xr-x';
1898        } elsif (S_ISLNK($mode)) {
1899                return 'lrwxrwxrwx';
1900        } elsif (S_ISREG($mode)) {
1901                # git cares only about the executable bit
1902                if ($mode & S_IXUSR) {
1903                        return '-rwxr-xr-x';
1904                } else {
1905                        return '-rw-r--r--';
1906                };
1907        } else {
1908                return '----------';
1909        }
1910}
1911
1912# convert file mode in octal to file type string
1913sub file_type {
1914        my $mode = shift;
1915
1916        if ($mode !~ m/^[0-7]+$/) {
1917                return $mode;
1918        } else {
1919                $mode = oct $mode;
1920        }
1921
1922        if (S_ISGITLINK($mode)) {
1923                return "submodule";
1924        } elsif (S_ISDIR($mode & S_IFMT)) {
1925                return "directory";
1926        } elsif (S_ISLNK($mode)) {
1927                return "symlink";
1928        } elsif (S_ISREG($mode)) {
1929                return "file";
1930        } else {
1931                return "unknown";
1932        }
1933}
1934
1935# convert file mode in octal to file type description string
1936sub file_type_long {
1937        my $mode = shift;
1938
1939        if ($mode !~ m/^[0-7]+$/) {
1940                return $mode;
1941        } else {
1942                $mode = oct $mode;
1943        }
1944
1945        if (S_ISGITLINK($mode)) {
1946                return "submodule";
1947        } elsif (S_ISDIR($mode & S_IFMT)) {
1948                return "directory";
1949        } elsif (S_ISLNK($mode)) {
1950                return "symlink";
1951        } elsif (S_ISREG($mode)) {
1952                if ($mode & S_IXUSR) {
1953                        return "executable";
1954                } else {
1955                        return "file";
1956                };
1957        } else {
1958                return "unknown";
1959        }
1960}
1961
1962
1963## ----------------------------------------------------------------------
1964## functions returning short HTML fragments, or transforming HTML fragments
1965## which don't belong to other sections
1966
1967# format line of commit message.
1968sub format_log_line_html {
1969        my $line = shift;
1970
1971        $line = esc_html($line, -nbsp=>1);
1972        $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1973                $cgi->a({-href => href(action=>"object", hash=>$1),
1974                                        -class => "text"}, $1);
1975        }eg;
1976
1977        return $line;
1978}
1979
1980# format marker of refs pointing to given object
1981
1982# the destination action is chosen based on object type and current context:
1983# - for annotated tags, we choose the tag view unless it's the current view
1984#   already, in which case we go to shortlog view
1985# - for other refs, we keep the current view if we're in history, shortlog or
1986#   log view, and select shortlog otherwise
1987sub format_ref_marker {
1988        my ($refs, $id) = @_;
1989        my $markers = '';
1990
1991        if (defined $refs->{$id}) {
1992                foreach my $ref (@{$refs->{$id}}) {
1993                        # this code exploits the fact that non-lightweight tags are the
1994                        # only indirect objects, and that they are the only objects for which
1995                        # we want to use tag instead of shortlog as action
1996                        my ($type, $name) = qw();
1997                        my $indirect = ($ref =~ s/\^\{\}$//);
1998                        # e.g. tags/v2.6.11 or heads/next
1999                        if ($ref =~ m!^(.*?)s?/(.*)$!) {
2000                                $type = $1;
2001                                $name = $2;
2002                        } else {
2003                                $type = "ref";
2004                                $name = $ref;
2005                        }
2006
2007                        my $class = $type;
2008                        $class .= " indirect" if $indirect;
2009
2010                        my $dest_action = "shortlog";
2011
2012                        if ($indirect) {
2013                                $dest_action = "tag" unless $action eq "tag";
2014                        } elsif ($action =~ /^(history|(short)?log)$/) {
2015                                $dest_action = $action;
2016                        }
2017
2018                        my $dest = "";
2019                        $dest .= "refs/" unless $ref =~ m!^refs/!;
2020                        $dest .= $ref;
2021
2022                        my $link = $cgi->a({
2023                                -href => href(
2024                                        action=>$dest_action,
2025                                        hash=>$dest
2026                                )}, $name);
2027
2028                        $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
2029                                $link . "</span>";
2030                }
2031        }
2032
2033        if ($markers) {
2034                return ' <span class="refs">'. $markers . '</span>';
2035        } else {
2036                return "";
2037        }
2038}
2039
2040# format, perhaps shortened and with markers, title line
2041sub format_subject_html {
2042        my ($long, $short, $href, $extra) = @_;
2043        $extra = '' unless defined($extra);
2044
2045        if (length($short) < length($long)) {
2046                $long =~ s/[[:cntrl:]]/?/g;
2047                return $cgi->a({-href => $href, -class => "list subject",
2048                                -title => to_utf8($long)},
2049                       esc_html($short)) . $extra;
2050        } else {
2051                return $cgi->a({-href => $href, -class => "list subject"},
2052                       esc_html($long)) . $extra;
2053        }
2054}
2055
2056# Rather than recomputing the url for an email multiple times, we cache it
2057# after the first hit. This gives a visible benefit in views where the avatar
2058# for the same email is used repeatedly (e.g. shortlog).
2059# The cache is shared by all avatar engines (currently gravatar only), which
2060# are free to use it as preferred. Since only one avatar engine is used for any
2061# given page, there's no risk for cache conflicts.
2062our %avatar_cache = ();
2063
2064# Compute the picon url for a given email, by using the picon search service over at
2065# http://www.cs.indiana.edu/picons/search.html
2066sub picon_url {
2067        my $email = lc shift;
2068        if (!$avatar_cache{$email}) {
2069                my ($user, $domain) = split('@', $email);
2070                $avatar_cache{$email} =
2071                        "//www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
2072                        "$domain/$user/" .
2073                        "users+domains+unknown/up/single";
2074        }
2075        return $avatar_cache{$email};
2076}
2077
2078# Compute the gravatar url for a given email, if it's not in the cache already.
2079# Gravatar stores only the part of the URL before the size, since that's the
2080# one computationally more expensive. This also allows reuse of the cache for
2081# different sizes (for this particular engine).
2082sub gravatar_url {
2083        my $email = lc shift;
2084        my $size = shift;
2085        $avatar_cache{$email} ||=
2086                "//www.gravatar.com/avatar/" .
2087                        Digest::MD5::md5_hex($email) . "?s=";
2088        return $avatar_cache{$email} . $size;
2089}
2090
2091# Insert an avatar for the given $email at the given $size if the feature
2092# is enabled.
2093sub git_get_avatar {
2094        my ($email, %opts) = @_;
2095        my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
2096        my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
2097        $opts{-size} ||= 'default';
2098        my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
2099        my $url = "";
2100        if ($git_avatar eq 'gravatar') {
2101                $url = gravatar_url($email, $size);
2102        } elsif ($git_avatar eq 'picon') {
2103                $url = picon_url($email);
2104        }
2105        # Other providers can be added by extending the if chain, defining $url
2106        # as needed. If no variant puts something in $url, we assume avatars
2107        # are completely disabled/unavailable.
2108        if ($url) {
2109                return $pre_white .
2110                       "<img width=\"$size\" " .
2111                            "class=\"avatar\" " .
2112                            "src=\"".esc_url($url)."\" " .
2113                            "alt=\"\" " .
2114                       "/>" . $post_white;
2115        } else {
2116                return "";
2117        }
2118}
2119
2120sub format_search_author {
2121        my ($author, $searchtype, $displaytext) = @_;
2122        my $have_search = gitweb_check_feature('search');
2123
2124        if ($have_search) {
2125                my $performed = "";
2126                if ($searchtype eq 'author') {
2127                        $performed = "authored";
2128                } elsif ($searchtype eq 'committer') {
2129                        $performed = "committed";
2130                }
2131
2132                return $cgi->a({-href => href(action=>"search", hash=>$hash,
2133                                searchtext=>$author,
2134                                searchtype=>$searchtype), class=>"list",
2135                                title=>"Search for commits $performed by $author"},
2136                                $displaytext);
2137
2138        } else {
2139                return $displaytext;
2140        }
2141}
2142
2143# format the author name of the given commit with the given tag
2144# the author name is chopped and escaped according to the other
2145# optional parameters (see chop_str).
2146sub format_author_html {
2147        my $tag = shift;
2148        my $co = shift;
2149        my $author = chop_and_escape_str($co->{'author_name'}, @_);
2150        return "<$tag class=\"author\">" .
2151               format_search_author($co->{'author_name'}, "author",
2152                       git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2153                       $author) .
2154               "</$tag>";
2155}
2156
2157# format git diff header line, i.e. "diff --(git|combined|cc) ..."
2158sub format_git_diff_header_line {
2159        my $line = shift;
2160        my $diffinfo = shift;
2161        my ($from, $to) = @_;
2162
2163        if ($diffinfo->{'nparents'}) {
2164                # combined diff
2165                $line =~ s!^(diff (.*?) )"?.*$!$1!;
2166                if ($to->{'href'}) {
2167                        $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2168                                         esc_path($to->{'file'}));
2169                } else { # file was deleted (no href)
2170                        $line .= esc_path($to->{'file'});
2171                }
2172        } else {
2173                # "ordinary" diff
2174                $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2175                if ($from->{'href'}) {
2176                        $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2177                                         'a/' . esc_path($from->{'file'}));
2178                } else { # file was added (no href)
2179                        $line .= 'a/' . esc_path($from->{'file'});
2180                }
2181                $line .= ' ';
2182                if ($to->{'href'}) {
2183                        $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2184                                         'b/' . esc_path($to->{'file'}));
2185                } else { # file was deleted
2186                        $line .= 'b/' . esc_path($to->{'file'});
2187                }
2188        }
2189
2190        return "<div class=\"diff header\">$line</div>\n";
2191}
2192
2193# format extended diff header line, before patch itself
2194sub format_extended_diff_header_line {
2195        my $line = shift;
2196        my $diffinfo = shift;
2197        my ($from, $to) = @_;
2198
2199        # match <path>
2200        if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2201                $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2202                                       esc_path($from->{'file'}));
2203        }
2204        if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2205                $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2206                                 esc_path($to->{'file'}));
2207        }
2208        # match single <mode>
2209        if ($line =~ m/\s(\d{6})$/) {
2210                $line .= '<span class="info"> (' .
2211                         file_type_long($1) .
2212                         ')</span>';
2213        }
2214        # match <hash>
2215        if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2216                # can match only for combined diff
2217                $line = 'index ';
2218                for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2219                        if ($from->{'href'}[$i]) {
2220                                $line .= $cgi->a({-href=>$from->{'href'}[$i],
2221                                                  -class=>"hash"},
2222                                                 substr($diffinfo->{'from_id'}[$i],0,7));
2223                        } else {
2224                                $line .= '0' x 7;
2225                        }
2226                        # separator
2227                        $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2228                }
2229                $line .= '..';
2230                if ($to->{'href'}) {
2231                        $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2232                                         substr($diffinfo->{'to_id'},0,7));
2233                } else {
2234                        $line .= '0' x 7;
2235                }
2236
2237        } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2238                # can match only for ordinary diff
2239                my ($from_link, $to_link);
2240                if ($from->{'href'}) {
2241                        $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2242                                             substr($diffinfo->{'from_id'},0,7));
2243                } else {
2244                        $from_link = '0' x 7;
2245                }
2246                if ($to->{'href'}) {
2247                        $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2248                                           substr($diffinfo->{'to_id'},0,7));
2249                } else {
2250                        $to_link = '0' x 7;
2251                }
2252                my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2253                $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2254        }
2255
2256        return $line . "<br/>\n";
2257}
2258
2259# format from-file/to-file diff header
2260sub format_diff_from_to_header {
2261        my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2262        my $line;
2263        my $result = '';
2264
2265        $line = $from_line;
2266        #assert($line =~ m/^---/) if DEBUG;
2267        # no extra formatting for "^--- /dev/null"
2268        if (! $diffinfo->{'nparents'}) {
2269                # ordinary (single parent) diff
2270                if ($line =~ m!^--- "?a/!) {
2271                        if ($from->{'href'}) {
2272                                $line = '--- a/' .
2273                                        $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2274                                                esc_path($from->{'file'}));
2275                        } else {
2276                                $line = '--- a/' .
2277                                        esc_path($from->{'file'});
2278                        }
2279                }
2280                $result .= qq!<div class="diff from_file">$line</div>\n!;
2281
2282        } else {
2283                # combined diff (merge commit)
2284                for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2285                        if ($from->{'href'}[$i]) {
2286                                $line = '--- ' .
2287                                        $cgi->a({-href=>href(action=>"blobdiff",
2288                                                             hash_parent=>$diffinfo->{'from_id'}[$i],
2289                                                             hash_parent_base=>$parents[$i],
2290                                                             file_parent=>$from->{'file'}[$i],
2291                                                             hash=>$diffinfo->{'to_id'},
2292                                                             hash_base=>$hash,
2293                                                             file_name=>$to->{'file'}),
2294                                                 -class=>"path",
2295                                                 -title=>"diff" . ($i+1)},
2296                                                $i+1) .
2297                                        '/' .
2298                                        $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2299                                                esc_path($from->{'file'}[$i]));
2300                        } else {
2301                                $line = '--- /dev/null';
2302                        }
2303                        $result .= qq!<div class="diff from_file">$line</div>\n!;
2304                }
2305        }
2306
2307        $line = $to_line;
2308        #assert($line =~ m/^\+\+\+/) if DEBUG;
2309        # no extra formatting for "^+++ /dev/null"
2310        if ($line =~ m!^\+\+\+ "?b/!) {
2311                if ($to->{'href'}) {
2312                        $line = '+++ b/' .
2313                                $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2314                                        esc_path($to->{'file'}));
2315                } else {
2316                        $line = '+++ b/' .
2317                                esc_path($to->{'file'});
2318                }
2319        }
2320        $result .= qq!<div class="diff to_file">$line</div>\n!;
2321
2322        return $result;
2323}
2324
2325# create note for patch simplified by combined diff
2326sub format_diff_cc_simplified {
2327        my ($diffinfo, @parents) = @_;
2328        my $result = '';
2329
2330        $result .= "<div class=\"diff header\">" .
2331                   "diff --cc ";
2332        if (!is_deleted($diffinfo)) {
2333                $result .= $cgi->a({-href => href(action=>"blob",
2334                                                  hash_base=>$hash,
2335                                                  hash=>$diffinfo->{'to_id'},
2336                                                  file_name=>$diffinfo->{'to_file'}),
2337                                    -class => "path"},
2338                                   esc_path($diffinfo->{'to_file'}));
2339        } else {
2340                $result .= esc_path($diffinfo->{'to_file'});
2341        }
2342        $result .= "</div>\n" . # class="diff header"
2343                   "<div class=\"diff nodifferences\">" .
2344                   "Simple merge" .
2345                   "</div>\n"; # class="diff nodifferences"
2346
2347        return $result;
2348}
2349
2350sub diff_line_class {
2351        my ($line, $from, $to) = @_;
2352
2353        # ordinary diff
2354        my $num_sign = 1;
2355        # combined diff
2356        if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2357                $num_sign = scalar @{$from->{'href'}};
2358        }
2359
2360        my @diff_line_classifier = (
2361                { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2362                { regexp => qr/^\\/,               class => "incomplete"  },
2363                { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2364                # classifier for context must come before classifier add/rem,
2365                # or we would have to use more complicated regexp, for example
2366                # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2367                { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2368                { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2369        );
2370        for my $clsfy (@diff_line_classifier) {
2371                return $clsfy->{'class'}
2372                        if ($line =~ $clsfy->{'regexp'});
2373        }
2374
2375        # fallback
2376        return "";
2377}
2378
2379# assumes that $from and $to are defined and correctly filled,
2380# and that $line holds a line of chunk header for unified diff
2381sub format_unidiff_chunk_header {
2382        my ($line, $from, $to) = @_;
2383
2384        my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2385                $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2386
2387        $from_lines = 0 unless defined $from_lines;
2388        $to_lines   = 0 unless defined $to_lines;
2389
2390        if ($from->{'href'}) {
2391                $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2392                                     -class=>"list"}, $from_text);
2393        }
2394        if ($to->{'href'}) {
2395                $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2396                                     -class=>"list"}, $to_text);
2397        }
2398        $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2399                "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2400        return $line;
2401}
2402
2403# assumes that $from and $to are defined and correctly filled,
2404# and that $line holds a line of chunk header for combined diff
2405sub format_cc_diff_chunk_header {
2406        my ($line, $from, $to) = @_;
2407
2408        my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2409        my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2410
2411        @from_text = split(' ', $ranges);
2412        for (my $i = 0; $i < @from_text; ++$i) {
2413                ($from_start[$i], $from_nlines[$i]) =
2414                        (split(',', substr($from_text[$i], 1)), 0);
2415        }
2416
2417        $to_text   = pop @from_text;
2418        $to_start  = pop @from_start;
2419        $to_nlines = pop @from_nlines;
2420
2421        $line = "<span class=\"chunk_info\">$prefix ";
2422        for (my $i = 0; $i < @from_text; ++$i) {
2423                if ($from->{'href'}[$i]) {
2424                        $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2425                                          -class=>"list"}, $from_text[$i]);
2426                } else {
2427                        $line .= $from_text[$i];
2428                }
2429                $line .= " ";
2430        }
2431        if ($to->{'href'}) {
2432                $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2433                                  -class=>"list"}, $to_text);
2434        } else {
2435                $line .= $to_text;
2436        }
2437        $line .= " $prefix</span>" .
2438                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2439        return $line;
2440}
2441
2442# process patch (diff) line (not to be used for diff headers),
2443# returning HTML-formatted (but not wrapped) line.
2444# If the line is passed as a reference, it is treated as HTML and not
2445# esc_html()'ed.
2446sub format_diff_line {
2447        my ($line, $diff_class, $from, $to) = @_;
2448
2449        if (ref($line)) {
2450                $line = $$line;
2451        } else {
2452                chomp $line;
2453                $line = untabify($line);
2454
2455                if ($from && $to && $line =~ m/^\@{2} /) {
2456                        $line = format_unidiff_chunk_header($line, $from, $to);
2457                } elsif ($from && $to && $line =~ m/^\@{3}/) {
2458                        $line = format_cc_diff_chunk_header($line, $from, $to);
2459                } else {
2460                        $line = esc_html($line, -nbsp=>1);
2461                }
2462        }
2463
2464        my $diff_classes = "diff";
2465        $diff_classes .= " $diff_class" if ($diff_class);
2466        $line = "<div class=\"$diff_classes\">$line</div>\n";
2467
2468        return $line;
2469}
2470
2471# Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2472# linked.  Pass the hash of the tree/commit to snapshot.
2473sub format_snapshot_links {
2474        my ($hash) = @_;
2475        my $num_fmts = @snapshot_fmts;
2476        if ($num_fmts > 1) {
2477                # A parenthesized list of links bearing format names.
2478                # e.g. "snapshot (_tar.gz_ _zip_)"
2479                return "snapshot (" . join(' ', map
2480                        $cgi->a({
2481                                -href => href(
2482                                        action=>"snapshot",
2483                                        hash=>$hash,
2484                                        snapshot_format=>$_
2485                                )
2486                        }, $known_snapshot_formats{$_}{'display'})
2487                , @snapshot_fmts) . ")";
2488        } elsif ($num_fmts == 1) {
2489                # A single "snapshot" link whose tooltip bears the format name.
2490                # i.e. "_snapshot_"
2491                my ($fmt) = @snapshot_fmts;
2492                return
2493                        $cgi->a({
2494                                -href => href(
2495                                        action=>"snapshot",
2496                                        hash=>$hash,
2497                                        snapshot_format=>$fmt
2498                                ),
2499                                -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2500                        }, "snapshot");
2501        } else { # $num_fmts == 0
2502                return undef;
2503        }
2504}
2505
2506## ......................................................................
2507## functions returning values to be passed, perhaps after some
2508## transformation, to other functions; e.g. returning arguments to href()
2509
2510# returns hash to be passed to href to generate gitweb URL
2511# in -title key it returns description of link
2512sub get_feed_info {
2513        my $format = shift || 'Atom';
2514        my %res = (action => lc($format));
2515
2516        # feed links are possible only for project views
2517        return unless (defined $project);
2518        # some views should link to OPML, or to generic project feed,
2519        # or don't have specific feed yet (so they should use generic)
2520        return if (!$action || $action =~ /^(?:tags|heads|forks|tag|search)$/x);
2521
2522        my $branch;
2523        # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2524        # from tag links; this also makes possible to detect branch links
2525        if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2526            (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2527                $branch = $1;
2528        }
2529        # find log type for feed description (title)
2530        my $type = 'log';
2531        if (defined $file_name) {
2532                $type  = "history of $file_name";
2533                $type .= "/" if ($action eq 'tree');
2534                $type .= " on '$branch'" if (defined $branch);
2535        } else {
2536                $type = "log of $branch" if (defined $branch);
2537        }
2538
2539        $res{-title} = $type;
2540        $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2541        $res{'file_name'} = $file_name;
2542
2543        return %res;
2544}
2545
2546## ----------------------------------------------------------------------
2547## git utility subroutines, invoking git commands
2548
2549# returns path to the core git executable and the --git-dir parameter as list
2550sub git_cmd {
2551        $number_of_git_cmds++;
2552        return $GIT, '--git-dir='.$git_dir;
2553}
2554
2555# quote the given arguments for passing them to the shell
2556# quote_command("command", "arg 1", "arg with ' and ! characters")
2557# => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2558# Try to avoid using this function wherever possible.
2559sub quote_command {
2560        return join(' ',
2561                map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2562}
2563
2564# get HEAD ref of given project as hash
2565sub git_get_head_hash {
2566        return git_get_full_hash(shift, 'HEAD');
2567}
2568
2569sub git_get_full_hash {
2570        return git_get_hash(@_);
2571}
2572
2573sub git_get_short_hash {
2574        return git_get_hash(@_, '--short=7');
2575}
2576
2577sub git_get_hash {
2578        my ($project, $hash, @options) = @_;
2579        my $o_git_dir = $git_dir;
2580        my $retval = undef;
2581        $git_dir = "$projectroot/$project";
2582        if (open my $fd, '-|', git_cmd(), 'rev-parse',
2583            '--verify', '-q', @options, $hash) {
2584                $retval = <$fd>;
2585                chomp $retval if defined $retval;
2586                close $fd;
2587        }
2588        if (defined $o_git_dir) {
2589                $git_dir = $o_git_dir;
2590        }
2591        return $retval;
2592}
2593
2594# get type of given object
2595sub git_get_type {
2596        my $hash = shift;
2597
2598        open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2599        my $type = <$fd>;
2600        close $fd or return;
2601        chomp $type;
2602        return $type;
2603}
2604
2605# repository configuration
2606our $config_file = '';
2607our %config;
2608
2609# store multiple values for single key as anonymous array reference
2610# single values stored directly in the hash, not as [ <value> ]
2611sub hash_set_multi {
2612        my ($hash, $key, $value) = @_;
2613
2614        if (!exists $hash->{$key}) {
2615                $hash->{$key} = $value;
2616        } elsif (!ref $hash->{$key}) {
2617                $hash->{$key} = [ $hash->{$key}, $value ];
2618        } else {
2619                push @{$hash->{$key}}, $value;
2620        }
2621}
2622
2623# return hash of git project configuration
2624# optionally limited to some section, e.g. 'gitweb'
2625sub git_parse_project_config {
2626        my $section_regexp = shift;
2627        my %config;
2628
2629        local $/ = "\0";
2630
2631        open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2632                or return;
2633
2634        while (my $keyval = <$fh>) {
2635                chomp $keyval;
2636                my ($key, $value) = split(/\n/, $keyval, 2);
2637
2638                hash_set_multi(\%config, $key, $value)
2639                        if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2640        }
2641        close $fh;
2642
2643        return %config;
2644}
2645
2646# convert config value to boolean: 'true' or 'false'
2647# no value, number > 0, 'true' and 'yes' values are true
2648# rest of values are treated as false (never as error)
2649sub config_to_bool {
2650        my $val = shift;
2651
2652        return 1 if !defined $val;             # section.key
2653
2654        # strip leading and trailing whitespace
2655        $val =~ s/^\s+//;
2656        $val =~ s/\s+$//;
2657
2658        return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2659                ($val =~ /^(?:true|yes)$/i));  # section.key = true
2660}
2661
2662# convert config value to simple decimal number
2663# an optional value suffix of 'k', 'm', or 'g' will cause the value
2664# to be multiplied by 1024, 1048576, or 1073741824
2665sub config_to_int {
2666        my $val = shift;
2667
2668        # strip leading and trailing whitespace
2669        $val =~ s/^\s+//;
2670        $val =~ s/\s+$//;
2671
2672        if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2673                $unit = lc($unit);
2674                # unknown unit is treated as 1
2675                return $num * ($unit eq 'g' ? 1073741824 :
2676                               $unit eq 'm' ?    1048576 :
2677                               $unit eq 'k' ?       1024 : 1);
2678        }
2679        return $val;
2680}
2681
2682# convert config value to array reference, if needed
2683sub config_to_multi {
2684        my $val = shift;
2685
2686        return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2687}
2688
2689sub git_get_project_config {
2690        my ($key, $type) = @_;
2691
2692        return unless defined $git_dir;
2693
2694        # key sanity check
2695        return unless ($key);
2696        # only subsection, if exists, is case sensitive,
2697        # and not lowercased by 'git config -z -l'
2698        if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2699                $lo =~ s/_//g;
2700                $key = join(".", lc($hi), $mi, lc($lo));
2701                return if ($lo =~ /\W/ || $hi =~ /\W/);
2702        } else {
2703                $key = lc($key);
2704                $key =~ s/_//g;
2705                return if ($key =~ /\W/);
2706        }
2707        $key =~ s/^gitweb\.//;
2708
2709        # type sanity check
2710        if (defined $type) {
2711                $type =~ s/^--//;
2712                $type = undef
2713                        unless ($type eq 'bool' || $type eq 'int');
2714        }
2715
2716        # get config
2717        if (!defined $config_file ||
2718            $config_file ne "$git_dir/config") {
2719                %config = git_parse_project_config('gitweb');
2720                $config_file = "$git_dir/config";
2721        }
2722
2723        # check if config variable (key) exists
2724        return unless exists $config{"gitweb.$key"};
2725
2726        # ensure given type
2727        if (!defined $type) {
2728                return $config{"gitweb.$key"};
2729        } elsif ($type eq 'bool') {
2730                # backward compatibility: 'git config --bool' returns true/false
2731                return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2732        } elsif ($type eq 'int') {
2733                return config_to_int($config{"gitweb.$key"});
2734        }
2735        return $config{"gitweb.$key"};
2736}
2737
2738# get hash of given path at given ref
2739sub git_get_hash_by_path {
2740        my $base = shift;
2741        my $path = shift || return undef;
2742        my $type = shift;
2743
2744        $path =~ s,/+$,,;
2745
2746        open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2747                or die_error(500, "Open git-ls-tree failed");
2748        my $line = <$fd>;
2749        close $fd or return undef;
2750
2751        if (!defined $line) {
2752                # there is no tree or hash given by $path at $base
2753                return undef;
2754        }
2755
2756        #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2757        $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2758        if (defined $type && $type ne $2) {
2759                # type doesn't match
2760                return undef;
2761        }
2762        return $3;
2763}
2764
2765# get path of entry with given hash at given tree-ish (ref)
2766# used to get 'from' filename for combined diff (merge commit) for renames
2767sub git_get_path_by_hash {
2768        my $base = shift || return;
2769        my $hash = shift || return;
2770
2771        local $/ = "\0";
2772
2773        open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2774                or return undef;
2775        while (my $line = <$fd>) {
2776                chomp $line;
2777
2778                #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2779                #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2780                if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2781                        close $fd;
2782                        return $1;
2783                }
2784        }
2785        close $fd;
2786        return undef;
2787}
2788
2789## ......................................................................
2790## git utility functions, directly accessing git repository
2791
2792# get the value of config variable either from file named as the variable
2793# itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2794# configuration variable in the repository config file.
2795sub git_get_file_or_project_config {
2796        my ($path, $name) = @_;
2797
2798        $git_dir = "$projectroot/$path";
2799        open my $fd, '<', "$git_dir/$name"
2800                or return git_get_project_config($name);
2801        my $conf = <$fd>;
2802        close $fd;
2803        if (defined $conf) {
2804                chomp $conf;
2805        }
2806        return $conf;
2807}
2808
2809sub git_get_project_description {
2810        my $path = shift;
2811        return git_get_file_or_project_config($path, 'description');
2812}
2813
2814sub git_get_project_category {
2815        my $path = shift;
2816        return git_get_file_or_project_config($path, 'category');
2817}
2818
2819
2820# supported formats:
2821# * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2822#   - if its contents is a number, use it as tag weight,
2823#   - otherwise add a tag with weight 1
2824# * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2825#   the same value multiple times increases tag weight
2826# * `gitweb.ctag' multi-valued repo config variable
2827sub git_get_project_ctags {
2828        my $project = shift;
2829        my $ctags = {};
2830
2831        $git_dir = "$projectroot/$project";
2832        if (opendir my $dh, "$git_dir/ctags") {
2833                my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2834                foreach my $tagfile (@files) {
2835                        open my $ct, '<', $tagfile
2836                                or next;
2837                        my $val = <$ct>;
2838                        chomp $val if $val;
2839                        close $ct;
2840
2841                        (my $ctag = $tagfile) =~ s#.*/##;
2842                        if ($val =~ /^\d+$/) {
2843                                $ctags->{$ctag} = $val;
2844                        } else {
2845                                $ctags->{$ctag} = 1;
2846                        }
2847                }
2848                closedir $dh;
2849
2850        } elsif (open my $fh, '<', "$git_dir/ctags") {
2851                while (my $line = <$fh>) {
2852                        chomp $line;
2853                        $ctags->{$line}++ if $line;
2854                }
2855                close $fh;
2856
2857        } else {
2858                my $taglist = config_to_multi(git_get_project_config('ctag'));
2859                foreach my $tag (@$taglist) {
2860                        $ctags->{$tag}++;
2861                }
2862        }
2863
2864        return $ctags;
2865}
2866
2867# return hash, where keys are content tags ('ctags'),
2868# and values are sum of weights of given tag in every project
2869sub git_gather_all_ctags {
2870        my $projects = shift;
2871        my $ctags = {};
2872
2873        foreach my $p (@$projects) {
2874                foreach my $ct (keys %{$p->{'ctags'}}) {
2875                        $ctags->{$ct} += $p->{'ctags'}->{$ct};
2876                }
2877        }
2878
2879        return $ctags;
2880}
2881
2882sub git_populate_project_tagcloud {
2883        my $ctags = shift;
2884
2885        # First, merge different-cased tags; tags vote on casing
2886        my %ctags_lc;
2887        foreach (keys %$ctags) {
2888                $ctags_lc{lc $_}->{count} += $ctags->{$_};
2889                if (not $ctags_lc{lc $_}->{topcount}
2890                    or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2891                        $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2892                        $ctags_lc{lc $_}->{topname} = $_;
2893                }
2894        }
2895
2896        my $cloud;
2897        my $matched = $input_params{'ctag'};
2898        if (eval { require HTML::TagCloud; 1; }) {
2899                $cloud = HTML::TagCloud->new;
2900                foreach my $ctag (sort keys %ctags_lc) {
2901                        # Pad the title with spaces so that the cloud looks
2902                        # less crammed.
2903                        my $title = esc_html($ctags_lc{$ctag}->{topname});
2904                        $title =~ s/ /&nbsp;/g;
2905                        $title =~ s/^/&nbsp;/g;
2906                        $title =~ s/$/&nbsp;/g;
2907                        if (defined $matched && $matched eq $ctag) {
2908                                $title = qq(<span class="match">$title</span>);
2909                        }
2910                        $cloud->add($title, href(project=>undef, ctag=>$ctag),
2911                                    $ctags_lc{$ctag}->{count});
2912                }
2913        } else {
2914                $cloud = {};
2915                foreach my $ctag (keys %ctags_lc) {
2916                        my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2917                        if (defined $matched && $matched eq $ctag) {
2918                                $title = qq(<span class="match">$title</span>);
2919                        }
2920                        $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2921                        $cloud->{$ctag}{ctag} =
2922                                $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2923                }
2924        }
2925        return $cloud;
2926}
2927
2928sub git_show_project_tagcloud {
2929        my ($cloud, $count) = @_;
2930        if (ref $cloud eq 'HTML::TagCloud') {
2931                return $cloud->html_and_css($count);
2932        } else {
2933                my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
2934                return
2935                        '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
2936                        join (', ', map {
2937                                $cloud->{$_}->{'ctag'}
2938                        } splice(@tags, 0, $count)) .
2939                        '</div>';
2940        }
2941}
2942
2943sub git_get_project_url_list {
2944        my $path = shift;
2945
2946        $git_dir = "$projectroot/$path";
2947        open my $fd, '<', "$git_dir/cloneurl"
2948                or return wantarray ?
2949                @{ config_to_multi(git_get_project_config('url')) } :
2950                   config_to_multi(git_get_project_config('url'));
2951        my @git_project_url_list = map { chomp; $_ } <$fd>;
2952        close $fd;
2953
2954        return wantarray ? @git_project_url_list : \@git_project_url_list;
2955}
2956
2957sub git_get_projects_list {
2958        my $filter = shift || '';
2959        my $paranoid = shift;
2960        my @list;
2961
2962        if (-d $projects_list) {
2963                # search in directory
2964                my $dir = $projects_list;
2965                # remove the trailing "/"
2966                $dir =~ s!/+$!!;
2967                my $pfxlen = length("$dir");
2968                my $pfxdepth = ($dir =~ tr!/!!);
2969                # when filtering, search only given subdirectory
2970                if ($filter && !$paranoid) {
2971                        $dir .= "/$filter";
2972                        $dir =~ s!/+$!!;
2973                }
2974
2975                File::Find::find({
2976                        follow_fast => 1, # follow symbolic links
2977                        follow_skip => 2, # ignore duplicates
2978                        dangling_symlinks => 0, # ignore dangling symlinks, silently
2979                        wanted => sub {
2980                                # global variables
2981                                our $project_maxdepth;
2982                                our $projectroot;
2983                                # skip project-list toplevel, if we get it.
2984                                return if (m!^[/.]$!);
2985                                # only directories can be git repositories
2986                                return unless (-d $_);
2987                                # don't traverse too deep (Find is super slow on os x)
2988                                # $project_maxdepth excludes depth of $projectroot
2989                                if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2990                                        $File::Find::prune = 1;
2991                                        return;
2992                                }
2993
2994                                my $path = substr($File::Find::name, $pfxlen + 1);
2995                                # paranoidly only filter here
2996                                if ($paranoid && $filter && $path !~ m!^\Q$filter\E/!) {
2997                                        next;
2998                                }
2999                                # we check related file in $projectroot
3000                                if (check_export_ok("$projectroot/$path")) {
3001                                        push @list, { path => $path };
3002                                        $File::Find::prune = 1;
3003                                }
3004                        },
3005                }, "$dir");
3006
3007        } elsif (-f $projects_list) {
3008                # read from file(url-encoded):
3009                # 'git%2Fgit.git Linus+Torvalds'
3010                # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3011                # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3012                open my $fd, '<', $projects_list or return;
3013        PROJECT:
3014                while (my $line = <$fd>) {
3015                        chomp $line;
3016                        my ($path, $owner) = split ' ', $line;
3017                        $path = unescape($path);
3018                        $owner = unescape($owner);
3019                        if (!defined $path) {
3020                                next;
3021                        }
3022                        # if $filter is rpovided, check if $path begins with $filter
3023                        if ($filter && $path !~ m!^\Q$filter\E/!) {
3024                                next;
3025                        }
3026                        if (check_export_ok("$projectroot/$path")) {
3027                                my $pr = {
3028                                        path => $path
3029                                };
3030                                if ($owner) {
3031                                        $pr->{'owner'} = to_utf8($owner);
3032                                }
3033                                push @list, $pr;
3034                        }
3035                }
3036                close $fd;
3037        }
3038        return @list;
3039}
3040
3041# written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
3042# as side effects it sets 'forks' field to list of forks for forked projects
3043sub filter_forks_from_projects_list {
3044        my $projects = shift;
3045
3046        my %trie; # prefix tree of directories (path components)
3047        # generate trie out of those directories that might contain forks
3048        foreach my $pr (@$projects) {
3049                my $path = $pr->{'path'};
3050                $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
3051                next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
3052                next unless ($path);      # skip '.git' repository: tests, git-instaweb
3053                next unless (-d "$projectroot/$path"); # containing directory exists
3054                $pr->{'forks'} = [];      # there can be 0 or more forks of project
3055
3056                # add to trie
3057                my @dirs = split('/', $path);
3058                # walk the trie, until either runs out of components or out of trie
3059                my $ref = \%trie;
3060                while (scalar @dirs &&
3061                       exists($ref->{$dirs[0]})) {
3062                        $ref = $ref->{shift @dirs};
3063                }
3064                # create rest of trie structure from rest of components
3065                foreach my $dir (@dirs) {
3066                        $ref = $ref->{$dir} = {};
3067                }
3068                # create end marker, store $pr as a data
3069                $ref->{''} = $pr if (!exists $ref->{''});
3070        }
3071
3072        # filter out forks, by finding shortest prefix match for paths
3073        my @filtered;
3074 PROJECT:
3075        foreach my $pr (@$projects) {
3076                # trie lookup
3077                my $ref = \%trie;
3078        DIR:
3079                foreach my $dir (split('/', $pr->{'path'})) {
3080                        if (exists $ref->{''}) {
3081                                # found [shortest] prefix, is a fork - skip it
3082                                push @{$ref->{''}{'forks'}}, $pr;
3083                                next PROJECT;
3084                        }
3085                        if (!exists $ref->{$dir}) {
3086                                # not in trie, cannot have prefix, not a fork
3087                                push @filtered, $pr;
3088                                next PROJECT;
3089                        }
3090                        # If the dir is there, we just walk one step down the trie.
3091                        $ref = $ref->{$dir};
3092                }
3093                # we ran out of trie
3094                # (shouldn't happen: it's either no match, or end marker)
3095                push @filtered, $pr;
3096        }
3097
3098        return @filtered;
3099}
3100
3101# note: fill_project_list_info must be run first,
3102# for 'descr_long' and 'ctags' to be filled
3103sub search_projects_list {
3104        my ($projlist, %opts) = @_;
3105        my $tagfilter  = $opts{'tagfilter'};
3106        my $search_re = $opts{'search_regexp'};
3107
3108        return @$projlist
3109                unless ($tagfilter || $search_re);
3110
3111        # searching projects require filling to be run before it;
3112        fill_project_list_info($projlist,
3113                               $tagfilter  ? 'ctags' : (),
3114                               $search_re ? ('path', 'descr') : ());
3115        my @projects;
3116 PROJECT:
3117        foreach my $pr (@$projlist) {
3118
3119                if ($tagfilter) {
3120                        next unless ref($pr->{'ctags'}) eq 'HASH';
3121                        next unless
3122                                grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
3123                }
3124
3125                if ($search_re) {
3126                        next unless
3127                                $pr->{'path'} =~ /$search_re/ ||
3128                                $pr->{'descr_long'} =~ /$search_re/;
3129                }
3130
3131                push @projects, $pr;
3132        }
3133
3134        return @projects;
3135}
3136
3137our $gitweb_project_owner = undef;
3138sub git_get_project_list_from_file {
3139
3140        return if (defined $gitweb_project_owner);
3141
3142        $gitweb_project_owner = {};
3143        # read from file (url-encoded):
3144        # 'git%2Fgit.git Linus+Torvalds'
3145        # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3146        # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3147        if (-f $projects_list) {
3148                open(my $fd, '<', $projects_list);
3149                while (my $line = <$fd>) {
3150                        chomp $line;
3151                        my ($pr, $ow) = split ' ', $line;
3152                        $pr = unescape($pr);
3153                        $ow = unescape($ow);
3154                        $gitweb_project_owner->{$pr} = to_utf8($ow);
3155                }
3156                close $fd;
3157        }
3158}
3159
3160sub git_get_project_owner {
3161        my $project = shift;
3162        my $owner;
3163
3164        return undef unless $project;
3165        $git_dir = "$projectroot/$project";
3166
3167        if (!defined $gitweb_project_owner) {
3168                git_get_project_list_from_file();
3169        }
3170
3171        if (exists $gitweb_project_owner->{$project}) {
3172                $owner = $gitweb_project_owner->{$project};
3173        }
3174        if (!defined $owner){
3175                $owner = git_get_project_config('owner');
3176        }
3177        if (!defined $owner) {
3178                $owner = get_file_owner("$git_dir");
3179        }
3180
3181        return $owner;
3182}
3183
3184sub git_get_last_activity {
3185        my ($path) = @_;
3186        my $fd;
3187
3188        $git_dir = "$projectroot/$path";
3189        open($fd, "-|", git_cmd(), 'for-each-ref',
3190             '--format=%(committer)',
3191             '--sort=-committerdate',
3192             '--count=1',
3193             'refs/heads') or return;
3194        my $most_recent = <$fd>;
3195        close $fd or return;
3196        if (defined $most_recent &&
3197            $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3198                my $timestamp = $1;
3199                my $age = time - $timestamp;
3200                return ($age, age_string($age));
3201        }
3202        return (undef, undef);
3203}
3204
3205# Implementation note: when a single remote is wanted, we cannot use 'git
3206# remote show -n' because that command always work (assuming it's a remote URL
3207# if it's not defined), and we cannot use 'git remote show' because that would
3208# try to make a network roundtrip. So the only way to find if that particular
3209# remote is defined is to walk the list provided by 'git remote -v' and stop if
3210# and when we find what we want.
3211sub git_get_remotes_list {
3212        my $wanted = shift;
3213        my %remotes = ();
3214
3215        open my $fd, '-|' , git_cmd(), 'remote', '-v';
3216        return unless $fd;
3217        while (my $remote = <$fd>) {
3218                chomp $remote;
3219                $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3220                next if $wanted and not $remote eq $wanted;
3221                my ($url, $key) = ($1, $2);
3222
3223                $remotes{$remote} ||= { 'heads' => () };
3224                $remotes{$remote}{$key} = $url;
3225        }
3226        close $fd or return;
3227        return wantarray ? %remotes : \%remotes;
3228}
3229
3230# Takes a hash of remotes as first parameter and fills it by adding the
3231# available remote heads for each of the indicated remotes.
3232sub fill_remote_heads {
3233        my $remotes = shift;
3234        my @heads = map { "remotes/$_" } keys %$remotes;
3235        my @remoteheads = git_get_heads_list(undef, @heads);
3236        foreach my $remote (keys %$remotes) {
3237                $remotes->{$remote}{'heads'} = [ grep {
3238                        $_->{'name'} =~ s!^$remote/!!
3239                        } @remoteheads ];
3240        }
3241}
3242
3243sub git_get_references {
3244        my $type = shift || "";
3245        my %refs;
3246        # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3247        # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3248        open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3249                ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3250                or return;
3251
3252        while (my $line = <$fd>) {
3253                chomp $line;
3254                if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3255                        if (defined $refs{$1}) {
3256                                push @{$refs{$1}}, $2;
3257                        } else {
3258                                $refs{$1} = [ $2 ];
3259                        }
3260                }
3261        }
3262        close $fd or return;
3263        return \%refs;
3264}
3265
3266sub git_get_rev_name_tags {
3267        my $hash = shift || return undef;
3268
3269        open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3270                or return;
3271        my $name_rev = <$fd>;
3272        close $fd;
3273
3274        if ($name_rev =~ m|^$hash tags/(.*)$|) {
3275                return $1;
3276        } else {
3277                # catches also '$hash undefined' output
3278                return undef;
3279        }
3280}
3281
3282## ----------------------------------------------------------------------
3283## parse to hash functions
3284
3285sub parse_date {
3286        my $epoch = shift;
3287        my $tz = shift || "-0000";
3288
3289        my %date;
3290        my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3291        my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3292        my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3293        $date{'hour'} = $hour;
3294        $date{'minute'} = $min;
3295        $date{'mday'} = $mday;
3296        $date{'day'} = $days[$wday];
3297        $date{'month'} = $months[$mon];
3298        $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3299                             $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3300        $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3301                             $mday, $months[$mon], $hour ,$min;
3302        $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3303                             1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3304
3305        my ($tz_sign, $tz_hour, $tz_min) =
3306                ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3307        $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3308        my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3309        ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3310        $date{'hour_local'} = $hour;
3311        $date{'minute_local'} = $min;
3312        $date{'tz_local'} = $tz;
3313        $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3314                                  1900+$year, $mon+1, $mday,
3315                                  $hour, $min, $sec, $tz);
3316        return %date;
3317}
3318
3319sub parse_tag {
3320        my $tag_id = shift;
3321        my %tag;
3322        my @comment;
3323
3324        open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3325        $tag{'id'} = $tag_id;
3326        while (my $line = <$fd>) {
3327                chomp $line;
3328                if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3329                        $tag{'object'} = $1;
3330                } elsif ($line =~ m/^type (.+)$/) {
3331                        $tag{'type'} = $1;
3332                } elsif ($line =~ m/^tag (.+)$/) {
3333                        $tag{'name'} = $1;
3334                } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3335                        $tag{'author'} = $1;
3336                        $tag{'author_epoch'} = $2;
3337                        $tag{'author_tz'} = $3;
3338                        if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3339                                $tag{'author_name'}  = $1;
3340                                $tag{'author_email'} = $2;
3341                        } else {
3342                                $tag{'author_name'} = $tag{'author'};
3343                        }
3344                } elsif ($line =~ m/--BEGIN/) {
3345                        push @comment, $line;
3346                        last;
3347                } elsif ($line eq "") {
3348                        last;
3349                }
3350        }
3351        push @comment, <$fd>;
3352        $tag{'comment'} = \@comment;
3353        close $fd or return;
3354        if (!defined $tag{'name'}) {
3355                return
3356        };
3357        return %tag
3358}
3359
3360sub parse_commit_text {
3361        my ($commit_text, $withparents) = @_;
3362        my @commit_lines = split '\n', $commit_text;
3363        my %co;
3364
3365        pop @commit_lines; # Remove '\0'
3366
3367        if (! @commit_lines) {
3368                return;
3369        }
3370
3371        my $header = shift @commit_lines;
3372        if ($header !~ m/^[0-9a-fA-F]{40}/) {
3373                return;
3374        }
3375        ($co{'id'}, my @parents) = split ' ', $header;
3376        while (my $line = shift @commit_lines) {
3377                last if $line eq "\n";
3378                if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3379                        $co{'tree'} = $1;
3380                } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3381                        push @parents, $1;
3382                } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3383                        $co{'author'} = to_utf8($1);
3384                        $co{'author_epoch'} = $2;
3385                        $co{'author_tz'} = $3;
3386                        if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3387                                $co{'author_name'}  = $1;
3388                                $co{'author_email'} = $2;
3389                        } else {
3390                                $co{'author_name'} = $co{'author'};
3391                        }
3392                } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3393                        $co{'committer'} = to_utf8($1);
3394                        $co{'committer_epoch'} = $2;
3395                        $co{'committer_tz'} = $3;
3396                        if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3397                                $co{'committer_name'}  = $1;
3398                                $co{'committer_email'} = $2;
3399                        } else {
3400                                $co{'committer_name'} = $co{'committer'};
3401                        }
3402                }
3403        }
3404        if (!defined $co{'tree'}) {
3405                return;
3406        };
3407        $co{'parents'} = \@parents;
3408        $co{'parent'} = $parents[0];
3409
3410        foreach my $title (@commit_lines) {
3411                $title =~ s/^    //;
3412                if ($title ne "") {
3413                        $co{'title'} = chop_str($title, 80, 5);
3414                        # remove leading stuff of merges to make the interesting part visible
3415                        if (length($title) > 50) {
3416                                $title =~ s/^Automatic //;
3417                                $title =~ s/^merge (of|with) /Merge ... /i;
3418                                if (length($title) > 50) {
3419                                        $title =~ s/(http|rsync):\/\///;
3420                                }
3421                                if (length($title) > 50) {
3422                                        $title =~ s/(master|www|rsync)\.//;
3423                                }
3424                                if (length($title) > 50) {
3425                                        $title =~ s/kernel.org:?//;
3426                                }
3427                                if (length($title) > 50) {
3428                                        $title =~ s/\/pub\/scm//;
3429                                }
3430                        }
3431                        $co{'title_short'} = chop_str($title, 50, 5);
3432                        last;
3433                }
3434        }
3435        if (! defined $co{'title'} || $co{'title'} eq "") {
3436                $co{'title'} = $co{'title_short'} = '(no commit message)';
3437        }
3438        # remove added spaces
3439        foreach my $line (@commit_lines) {
3440                $line =~ s/^    //;
3441        }
3442        $co{'comment'} = \@commit_lines;
3443
3444        my $age = time - $co{'committer_epoch'};
3445        $co{'age'} = $age;
3446        $co{'age_string'} = age_string($age);
3447        my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3448        if ($age > 60*60*24*7*2) {
3449                $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3450                $co{'age_string_age'} = $co{'age_string'};
3451        } else {
3452                $co{'age_string_date'} = $co{'age_string'};
3453                $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3454        }
3455        return %co;
3456}
3457
3458sub parse_commit {
3459        my ($commit_id) = @_;
3460        my %co;
3461
3462        local $/ = "\0";
3463
3464        open my $fd, "-|", git_cmd(), "rev-list",
3465                "--parents",
3466                "--header",
3467                "--max-count=1",
3468                $commit_id,
3469                "--",
3470                or die_error(500, "Open git-rev-list failed");
3471        %co = parse_commit_text(<$fd>, 1);
3472        close $fd;
3473
3474        return %co;
3475}
3476
3477sub parse_commits {
3478        my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3479        my @cos;
3480
3481        $maxcount ||= 1;
3482        $skip ||= 0;
3483
3484        local $/ = "\0";
3485
3486        open my $fd, "-|", git_cmd(), "rev-list",
3487                "--header",
3488                @args,
3489                ("--max-count=" . $maxcount),
3490                ("--skip=" . $skip),
3491                @extra_options,
3492                $commit_id,
3493                "--",
3494                ($filename ? ($filename) : ())
3495                or die_error(500, "Open git-rev-list failed");
3496        while (my $line = <$fd>) {
3497                my %co = parse_commit_text($line);
3498                push @cos, \%co;
3499        }
3500        close $fd;
3501
3502        return wantarray ? @cos : \@cos;
3503}
3504
3505# parse line of git-diff-tree "raw" output
3506sub parse_difftree_raw_line {
3507        my $line = shift;
3508        my %res;
3509
3510        # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3511        # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3512        if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3513                $res{'from_mode'} = $1;
3514                $res{'to_mode'} = $2;
3515                $res{'from_id'} = $3;
3516                $res{'to_id'} = $4;
3517                $res{'status'} = $5;
3518                $res{'similarity'} = $6;
3519                if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3520                        ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3521                } else {
3522                        $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3523                }
3524        }
3525        # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3526        # combined diff (for merge commit)
3527        elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3528                $res{'nparents'}  = length($1);
3529                $res{'from_mode'} = [ split(' ', $2) ];
3530                $res{'to_mode'} = pop @{$res{'from_mode'}};
3531                $res{'from_id'} = [ split(' ', $3) ];
3532                $res{'to_id'} = pop @{$res{'from_id'}};
3533                $res{'status'} = [ split('', $4) ];
3534                $res{'to_file'} = unquote($5);
3535        }
3536        # 'c512b523472485aef4fff9e57b229d9d243c967f'
3537        elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3538                $res{'commit'} = $1;
3539        }
3540
3541        return wantarray ? %res : \%res;
3542}
3543
3544# wrapper: return parsed line of git-diff-tree "raw" output
3545# (the argument might be raw line, or parsed info)
3546sub parsed_difftree_line {
3547        my $line_or_ref = shift;
3548
3549        if (ref($line_or_ref) eq "HASH") {
3550                # pre-parsed (or generated by hand)
3551                return $line_or_ref;
3552        } else {
3553                return parse_difftree_raw_line($line_or_ref);
3554        }
3555}
3556
3557# parse line of git-ls-tree output
3558sub parse_ls_tree_line {
3559        my $line = shift;
3560        my %opts = @_;
3561        my %res;
3562
3563        if ($opts{'-l'}) {
3564                #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3565                $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3566
3567                $res{'mode'} = $1;
3568                $res{'type'} = $2;
3569                $res{'hash'} = $3;
3570                $res{'size'} = $4;
3571                if ($opts{'-z'}) {
3572                        $res{'name'} = $5;
3573                } else {
3574                        $res{'name'} = unquote($5);
3575                }
3576        } else {
3577                #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3578                $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3579
3580                $res{'mode'} = $1;
3581                $res{'type'} = $2;
3582                $res{'hash'} = $3;
3583                if ($opts{'-z'}) {
3584                        $res{'name'} = $4;
3585                } else {
3586                        $res{'name'} = unquote($4);
3587                }
3588        }
3589
3590        return wantarray ? %res : \%res;
3591}
3592
3593# generates _two_ hashes, references to which are passed as 2 and 3 argument
3594sub parse_from_to_diffinfo {
3595        my ($diffinfo, $from, $to, @parents) = @_;
3596
3597        if ($diffinfo->{'nparents'}) {
3598                # combined diff
3599                $from->{'file'} = [];
3600                $from->{'href'} = [];
3601                fill_from_file_info($diffinfo, @parents)
3602                        unless exists $diffinfo->{'from_file'};
3603                for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3604                        $from->{'file'}[$i] =
3605                                defined $diffinfo->{'from_file'}[$i] ?
3606                                        $diffinfo->{'from_file'}[$i] :
3607                                        $diffinfo->{'to_file'};
3608                        if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3609                                $from->{'href'}[$i] = href(action=>"blob",
3610                                                           hash_base=>$parents[$i],
3611                                                           hash=>$diffinfo->{'from_id'}[$i],
3612                                                           file_name=>$from->{'file'}[$i]);
3613                        } else {
3614                                $from->{'href'}[$i] = undef;
3615                        }
3616                }
3617        } else {
3618                # ordinary (not combined) diff
3619                $from->{'file'} = $diffinfo->{'from_file'};
3620                if ($diffinfo->{'status'} ne "A") { # not new (added) file
3621                        $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3622                                               hash=>$diffinfo->{'from_id'},
3623                                               file_name=>$from->{'file'});
3624                } else {
3625                        delete $from->{'href'};
3626                }
3627        }
3628
3629        $to->{'file'} = $diffinfo->{'to_file'};
3630        if (!is_deleted($diffinfo)) { # file exists in result
3631                $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3632                                     hash=>$diffinfo->{'to_id'},
3633                                     file_name=>$to->{'file'});
3634        } else {
3635                delete $to->{'href'};
3636        }
3637}
3638
3639## ......................................................................
3640## parse to array of hashes functions
3641
3642sub git_get_heads_list {
3643        my ($limit, @classes) = @_;
3644        @classes = ('heads') unless @classes;
3645        my @patterns = map { "refs/$_" } @classes;
3646        my @headslist;
3647
3648        open my $fd, '-|', git_cmd(), 'for-each-ref',
3649                ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3650                '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3651                @patterns
3652                or return;
3653        while (my $line = <$fd>) {
3654                my %ref_item;
3655
3656                chomp $line;
3657                my ($refinfo, $committerinfo) = split(/\0/, $line);
3658                my ($hash, $name, $title) = split(' ', $refinfo, 3);
3659                my ($committer, $epoch, $tz) =
3660                        ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3661                $ref_item{'fullname'}  = $name;
3662                $name =~ s!^refs/(?:head|remote)s/!!;
3663
3664                $ref_item{'name'}  = $name;
3665                $ref_item{'id'}    = $hash;
3666                $ref_item{'title'} = $title || '(no commit message)';
3667                $ref_item{'epoch'} = $epoch;
3668                if ($epoch) {
3669                        $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3670                } else {
3671                        $ref_item{'age'} = "unknown";
3672                }
3673
3674                push @headslist, \%ref_item;
3675        }
3676        close $fd;
3677
3678        return wantarray ? @headslist : \@headslist;
3679}
3680
3681sub git_get_tags_list {
3682        my $limit = shift;
3683        my @tagslist;
3684
3685        open my $fd, '-|', git_cmd(), 'for-each-ref',
3686                ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3687                '--format=%(objectname) %(objecttype) %(refname) '.
3688                '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3689                'refs/tags'
3690                or return;
3691        while (my $line = <$fd>) {
3692                my %ref_item;
3693
3694                chomp $line;
3695                my ($refinfo, $creatorinfo) = split(/\0/, $line);
3696                my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3697                my ($creator, $epoch, $tz) =
3698                        ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3699                $ref_item{'fullname'} = $name;
3700                $name =~ s!^refs/tags/!!;
3701
3702                $ref_item{'type'} = $type;
3703                $ref_item{'id'} = $id;
3704                $ref_item{'name'} = $name;
3705                if ($type eq "tag") {
3706                        $ref_item{'subject'} = $title;
3707                        $ref_item{'reftype'} = $reftype;
3708                        $ref_item{'refid'}   = $refid;
3709                } else {
3710                        $ref_item{'reftype'} = $type;
3711                        $ref_item{'refid'}   = $id;
3712                }
3713
3714                if ($type eq "tag" || $type eq "commit") {
3715                        $ref_item{'epoch'} = $epoch;
3716                        if ($epoch) {
3717                                $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3718                        } else {
3719                                $ref_item{'age'} = "unknown";
3720                        }
3721                }
3722
3723                push @tagslist, \%ref_item;
3724        }
3725        close $fd;
3726
3727        return wantarray ? @tagslist : \@tagslist;
3728}
3729
3730## ----------------------------------------------------------------------
3731## filesystem-related functions
3732
3733sub get_file_owner {
3734        my $path = shift;
3735
3736        my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3737        my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3738        if (!defined $gcos) {
3739                return undef;
3740        }
3741        my $owner = $gcos;
3742        $owner =~ s/[,;].*$//;
3743        return to_utf8($owner);
3744}
3745
3746# assume that file exists
3747sub insert_file {
3748        my $filename = shift;
3749
3750        open my $fd, '<', $filename;
3751        print map { to_utf8($_) } <$fd>;
3752        close $fd;
3753}
3754
3755## ......................................................................
3756## mimetype related functions
3757
3758sub mimetype_guess_file {
3759        my $filename = shift;
3760        my $mimemap = shift;
3761        -r $mimemap or return undef;
3762
3763        my %mimemap;
3764        open(my $mh, '<', $mimemap) or return undef;
3765        while (<$mh>) {
3766                next if m/^#/; # skip comments
3767                my ($mimetype, @exts) = split(/\s+/);
3768                foreach my $ext (@exts) {
3769                        $mimemap{$ext} = $mimetype;
3770                }
3771        }
3772        close($mh);
3773
3774        $filename =~ /\.([^.]*)$/;
3775        return $mimemap{$1};
3776}
3777
3778sub mimetype_guess {
3779        my $filename = shift;
3780        my $mime;
3781        $filename =~ /\./ or return undef;
3782
3783        if ($mimetypes_file) {
3784                my $file = $mimetypes_file;
3785                if ($file !~ m!^/!) { # if it is relative path
3786                        # it is relative to project
3787                        $file = "$projectroot/$project/$file";
3788                }
3789                $mime = mimetype_guess_file($filename, $file);
3790        }
3791        $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3792        return $mime;
3793}
3794
3795sub blob_mimetype {
3796        my $fd = shift;
3797        my $filename = shift;
3798
3799        if ($filename) {
3800                my $mime = mimetype_guess($filename);
3801                $mime and return $mime;
3802        }
3803
3804        # just in case
3805        return $default_blob_plain_mimetype unless $fd;
3806
3807        if (-T $fd) {
3808                return 'text/plain';
3809        } elsif (! $filename) {
3810                return 'application/octet-stream';
3811        } elsif ($filename =~ m/\.png$/i) {
3812                return 'image/png';
3813        } elsif ($filename =~ m/\.gif$/i) {
3814                return 'image/gif';
3815        } elsif ($filename =~ m/\.jpe?g$/i) {
3816                return 'image/jpeg';
3817        } else {
3818                return 'application/octet-stream';
3819        }
3820}
3821
3822sub blob_contenttype {
3823        my ($fd, $file_name, $type) = @_;
3824
3825        $type ||= blob_mimetype($fd, $file_name);
3826        if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3827                $type .= "; charset=$default_text_plain_charset";
3828        }
3829
3830        return $type;
3831}
3832
3833# guess file syntax for syntax highlighting; return undef if no highlighting
3834# the name of syntax can (in the future) depend on syntax highlighter used
3835sub guess_file_syntax {
3836        my ($highlight, $mimetype, $file_name) = @_;
3837        return undef unless ($highlight && defined $file_name);
3838        my $basename = basename($file_name, '.in');
3839        return $highlight_basename{$basename}
3840                if exists $highlight_basename{$basename};
3841
3842        $basename =~ /\.([^.]*)$/;
3843        my $ext = $1 or return undef;
3844        return $highlight_ext{$ext}
3845                if exists $highlight_ext{$ext};
3846
3847        return undef;
3848}
3849
3850# run highlighter and return FD of its output,
3851# or return original FD if no highlighting
3852sub run_highlighter {
3853        my ($fd, $highlight, $syntax) = @_;
3854        return $fd unless ($highlight && defined $syntax);
3855
3856        close $fd;
3857        open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3858                  quote_command($highlight_bin).
3859                  " --replace-tabs=8 --fragment --syntax $syntax |"
3860                or die_error(500, "Couldn't open file or run syntax highlighter");
3861        return $fd;
3862}
3863
3864## ======================================================================
3865## functions printing HTML: header, footer, error page
3866
3867sub get_page_title {
3868        my $title = to_utf8($site_name);
3869
3870        unless (defined $project) {
3871                if (defined $project_filter) {
3872                        $title .= " - projects in '" . esc_path($project_filter) . "'";
3873                }
3874                return $title;
3875        }
3876        $title .= " - " . to_utf8($project);
3877
3878        return $title unless (defined $action);
3879        $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3880
3881        return $title unless (defined $file_name);
3882        $title .= " - " . esc_path($file_name);
3883        if ($action eq "tree" && $file_name !~ m|/$|) {
3884                $title .= "/";
3885        }
3886
3887        return $title;
3888}
3889
3890sub get_content_type_html {
3891        # require explicit support from the UA if we are to send the page as
3892        # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3893        # we have to do this because MSIE sometimes globs '*/*', pretending to
3894        # support xhtml+xml but choking when it gets what it asked for.
3895        if (defined $cgi->http('HTTP_ACCEPT') &&
3896            $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3897            $cgi->Accept('application/xhtml+xml') != 0) {
3898                return 'application/xhtml+xml';
3899        } else {
3900                return 'text/html';
3901        }
3902}
3903
3904sub print_feed_meta {
3905        if (defined $project) {
3906                my %href_params = get_feed_info();
3907                if (!exists $href_params{'-title'}) {
3908                        $href_params{'-title'} = 'log';
3909                }
3910
3911                foreach my $format (qw(RSS Atom)) {
3912                        my $type = lc($format);
3913                        my %link_attr = (
3914                                '-rel' => 'alternate',
3915                                '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3916                                '-type' => "application/$type+xml"
3917                        );
3918
3919                        $href_params{'extra_options'} = undef;
3920                        $href_params{'action'} = $type;
3921                        $link_attr{'-href'} = href(%href_params);
3922                        print "<link ".
3923                              "rel=\"$link_attr{'-rel'}\" ".
3924                              "title=\"$link_attr{'-title'}\" ".
3925                              "href=\"$link_attr{'-href'}\" ".
3926                              "type=\"$link_attr{'-type'}\" ".
3927                              "/>\n";
3928
3929                        $href_params{'extra_options'} = '--no-merges';
3930                        $link_attr{'-href'} = href(%href_params);
3931                        $link_attr{'-title'} .= ' (no merges)';
3932                        print "<link ".
3933                              "rel=\"$link_attr{'-rel'}\" ".
3934                              "title=\"$link_attr{'-title'}\" ".
3935                              "href=\"$link_attr{'-href'}\" ".
3936                              "type=\"$link_attr{'-type'}\" ".
3937                              "/>\n";
3938                }
3939
3940        } else {
3941                printf('<link rel="alternate" title="%s projects list" '.
3942                       'href="%s" type="text/plain; charset=utf-8" />'."\n",
3943                       esc_attr($site_name), href(project=>undef, action=>"project_index"));
3944                printf('<link rel="alternate" title="%s projects feeds" '.
3945                       'href="%s" type="text/x-opml" />'."\n",
3946                       esc_attr($site_name), href(project=>undef, action=>"opml"));
3947        }
3948}
3949
3950sub print_header_links {
3951        my $status = shift;
3952
3953        # print out each stylesheet that exist, providing backwards capability
3954        # for those people who defined $stylesheet in a config file
3955        if (defined $stylesheet) {
3956                print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3957        } else {
3958                foreach my $stylesheet (@stylesheets) {
3959                        next unless $stylesheet;
3960                        print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3961                }
3962        }
3963        print_feed_meta()
3964                if ($status eq '200 OK');
3965        if (defined $favicon) {
3966                print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3967        }
3968}
3969
3970sub print_nav_breadcrumbs_path {
3971        my $dirprefix = undef;
3972        while (my $part = shift) {
3973                $dirprefix .= "/" if defined $dirprefix;
3974                $dirprefix .= $part;
3975                print $cgi->a({-href => href(project => undef,
3976                                             project_filter => $dirprefix,
3977                                             action => "project_list")},
3978                              esc_html($part)) . " / ";
3979        }
3980}
3981
3982sub print_nav_breadcrumbs {
3983        my %opts = @_;
3984
3985        print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3986        if (defined $project) {
3987                my @dirname = split '/', $project;
3988                my $projectbasename = pop @dirname;
3989                print_nav_breadcrumbs_path(@dirname);
3990                print $cgi->a({-href => href(action=>"summary")}, esc_html($projectbasename));
3991                if (defined $action) {
3992                        my $action_print = $action ;
3993                        if (defined $opts{-action_extra}) {
3994                                $action_print = $cgi->a({-href => href(action=>$action)},
3995                                        $action);
3996                        }
3997                        print " / $action_print";
3998                }
3999                if (defined $opts{-action_extra}) {
4000                        print " / $opts{-action_extra}";
4001                }
4002                print "\n";
4003        } elsif (defined $project_filter) {
4004                print_nav_breadcrumbs_path(split '/', $project_filter);
4005        }
4006}
4007
4008sub print_search_form {
4009        if (!defined $searchtext) {
4010                $searchtext = "";
4011        }
4012        my $search_hash;
4013        if (defined $hash_base) {
4014                $search_hash = $hash_base;
4015        } elsif (defined $hash) {
4016                $search_hash = $hash;
4017        } else {
4018                $search_hash = "HEAD";
4019        }
4020        my $action = $my_uri;
4021        my $use_pathinfo = gitweb_check_feature('pathinfo');
4022        if ($use_pathinfo) {
4023                $action .= "/".esc_url($project);
4024        }
4025        print $cgi->startform(-method => "get", -action => $action) .
4026              "<div class=\"search\">\n" .
4027              (!$use_pathinfo &&
4028              $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
4029              $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
4030              $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
4031              $cgi->popup_menu(-name => 'st', -default => 'commit',
4032                               -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
4033              $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
4034              " search:\n",
4035              $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
4036              "<span title=\"Extended regular expression\">" .
4037              $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
4038                             -checked => $search_use_regexp) .
4039              "</span>" .
4040              "</div>" .
4041              $cgi->end_form() . "\n";
4042}
4043
4044sub git_header_html {
4045        my $status = shift || "200 OK";
4046        my $expires = shift;
4047        my %opts = @_;
4048
4049        my $title = get_page_title();
4050        my $content_type = get_content_type_html();
4051        print $cgi->header(-type=>$content_type, -charset => 'utf-8',
4052                           -status=> $status, -expires => $expires)
4053                unless ($opts{'-no_http_header'});
4054        my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
4055        print <<EOF;
4056<?xml version="1.0" encoding="utf-8"?>
4057<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
4058<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
4059<!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
4060<!-- git core binaries version $git_version -->
4061<head>
4062<meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
4063<meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
4064<meta name="robots" content="index, nofollow"/>
4065<title>$title</title>
4066EOF
4067        # the stylesheet, favicon etc urls won't work correctly with path_info
4068        # unless we set the appropriate base URL
4069        if ($ENV{'PATH_INFO'}) {
4070                print "<base href=\"".esc_url($base_url)."\" />\n";
4071        }
4072        print_header_links($status);
4073
4074        if (defined $site_html_head_string) {
4075                print to_utf8($site_html_head_string);
4076        }
4077
4078        print "</head>\n" .
4079              "<body>\n";
4080
4081        if (defined $site_header && -f $site_header) {
4082                insert_file($site_header);
4083        }
4084
4085        print "<div class=\"page_header\">\n";
4086        if (defined $logo) {
4087                print $cgi->a({-href => esc_url($logo_url),
4088                               -title => $logo_label},
4089                              $cgi->img({-src => esc_url($logo),
4090                                         -width => 72, -height => 27,
4091                                         -alt => "git",
4092                                         -class => "logo"}));
4093        }
4094        print_nav_breadcrumbs(%opts);
4095        print "</div>\n";
4096
4097        my $have_search = gitweb_check_feature('search');
4098        if (defined $project && $have_search) {
4099                print_search_form();
4100        }
4101}
4102
4103sub git_footer_html {
4104        my $feed_class = 'rss_logo';
4105
4106        print "<div class=\"page_footer\">\n";
4107        if (defined $project) {
4108                my $descr = git_get_project_description($project);
4109                if (defined $descr) {
4110                        print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
4111                }
4112
4113                my %href_params = get_feed_info();
4114                if (!%href_params) {
4115                        $feed_class .= ' generic';
4116                }
4117                $href_params{'-title'} ||= 'log';
4118
4119                foreach my $format (qw(RSS Atom)) {
4120                        $href_params{'action'} = lc($format);
4121                        print $cgi->a({-href => href(%href_params),
4122                                      -title => "$href_params{'-title'} $format feed",
4123                                      -class => $feed_class}, $format)."\n";
4124                }
4125
4126        } else {
4127                print $cgi->a({-href => href(project=>undef, action=>"opml",
4128                                             project_filter => $project_filter),
4129                              -class => $feed_class}, "OPML") . " ";
4130                print $cgi->a({-href => href(project=>undef, action=>"project_index",
4131                                             project_filter => $project_filter),
4132                              -class => $feed_class}, "TXT") . "\n";
4133        }
4134        print "</div>\n"; # class="page_footer"
4135
4136        if (defined $t0 && gitweb_check_feature('timed')) {
4137                print "<div id=\"generating_info\">\n";
4138                print 'This page took '.
4139                      '<span id="generating_time" class="time_span">'.
4140                      tv_interval($t0, [ gettimeofday() ]).
4141                      ' seconds </span>'.
4142                      ' and '.
4143                      '<span id="generating_cmd">'.
4144                      $number_of_git_cmds.
4145                      '</span> git commands '.
4146                      " to generate.\n";
4147                print "</div>\n"; # class="page_footer"
4148        }
4149
4150        if (defined $site_footer && -f $site_footer) {
4151                insert_file($site_footer);
4152        }
4153
4154        print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4155        if (defined $action &&
4156            $action eq 'blame_incremental') {
4157                print qq!<script type="text/javascript">\n!.
4158                      qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4159                      qq!           "!. href() .qq!");\n!.
4160                      qq!</script>\n!;
4161        } else {
4162                my ($jstimezone, $tz_cookie, $datetime_class) =
4163                        gitweb_get_feature('javascript-timezone');
4164
4165                print qq!<script type="text/javascript">\n!.
4166                      qq!window.onload = function () {\n!;
4167                if (gitweb_check_feature('javascript-actions')) {
4168                        print qq!       fixLinks();\n!;
4169                }
4170                if ($jstimezone && $tz_cookie && $datetime_class) {
4171                        print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4172                              qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4173                }
4174                print qq!};\n!.
4175                      qq!</script>\n!;
4176        }
4177
4178        print "</body>\n" .
4179              "</html>";
4180}
4181
4182# die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4183# Example: die_error(404, 'Hash not found')
4184# By convention, use the following status codes (as defined in RFC 2616):
4185# 400: Invalid or missing CGI parameters, or
4186#      requested object exists but has wrong type.
4187# 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4188#      this server or project.
4189# 404: Requested object/revision/project doesn't exist.
4190# 500: The server isn't configured properly, or
4191#      an internal error occurred (e.g. failed assertions caused by bugs), or
4192#      an unknown error occurred (e.g. the git binary died unexpectedly).
4193# 503: The server is currently unavailable (because it is overloaded,
4194#      or down for maintenance).  Generally, this is a temporary state.
4195sub die_error {
4196        my $status = shift || 500;
4197        my $error = esc_html(shift) || "Internal Server Error";
4198        my $extra = shift;
4199        my %opts = @_;
4200
4201        my %http_responses = (
4202                400 => '400 Bad Request',
4203                403 => '403 Forbidden',
4204                404 => '404 Not Found',
4205                500 => '500 Internal Server Error',
4206                503 => '503 Service Unavailable',
4207        );
4208        git_header_html($http_responses{$status}, undef, %opts);
4209        print <<EOF;
4210<div class="page_body">
4211<br /><br />
4212$status - $error
4213<br />
4214EOF
4215        if (defined $extra) {
4216                print "<hr />\n" .
4217                      "$extra\n";
4218        }
4219        print "</div>\n";
4220
4221        git_footer_html();
4222        goto DONE_GITWEB
4223                unless ($opts{'-error_handler'});
4224}
4225
4226## ----------------------------------------------------------------------
4227## functions printing or outputting HTML: navigation
4228
4229sub git_print_page_nav {
4230        my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4231        $extra = '' if !defined $extra; # pager or formats
4232
4233        my @navs = qw(summary shortlog log commit commitdiff tree);
4234        if ($suppress) {
4235                @navs = grep { $_ ne $suppress } @navs;
4236        }
4237
4238        my %arg = map { $_ => {action=>$_} } @navs;
4239        if (defined $head) {
4240                for (qw(commit commitdiff)) {
4241                        $arg{$_}{'hash'} = $head;
4242                }
4243                if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4244                        for (qw(shortlog log)) {
4245                                $arg{$_}{'hash'} = $head;
4246                        }
4247                }
4248        }
4249
4250        $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4251        $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4252
4253        my @actions = gitweb_get_feature('actions');
4254        my %repl = (
4255                '%' => '%',
4256                'n' => $project,         # project name
4257                'f' => $git_dir,         # project path within filesystem
4258                'h' => $treehead || '',  # current hash ('h' parameter)
4259                'b' => $treebase || '',  # hash base ('hb' parameter)
4260        );
4261        while (@actions) {
4262                my ($label, $link, $pos) = splice(@actions,0,3);
4263                # insert
4264                @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4265                # munch munch
4266                $link =~ s/%([%nfhb])/$repl{$1}/g;
4267                $arg{$label}{'_href'} = $link;
4268        }
4269
4270        print "<div class=\"page_nav\">\n" .
4271                (join " | ",
4272                 map { $_ eq $current ?
4273                       $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4274                 } @navs);
4275        print "<br/>\n$extra<br/>\n" .
4276              "</div>\n";
4277}
4278
4279# returns a submenu for the nagivation of the refs views (tags, heads,
4280# remotes) with the current view disabled and the remotes view only
4281# available if the feature is enabled
4282sub format_ref_views {
4283        my ($current) = @_;
4284        my @ref_views = qw{tags heads};
4285        push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4286        return join " | ", map {
4287                $_ eq $current ? $_ :
4288                $cgi->a({-href => href(action=>$_)}, $_)
4289        } @ref_views
4290}
4291
4292sub format_paging_nav {
4293        my ($action, $page, $has_next_link) = @_;
4294        my $paging_nav;
4295
4296
4297        if ($page > 0) {
4298                $paging_nav .=
4299                        $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4300                        " &sdot; " .
4301                        $cgi->a({-href => href(-replay=>1, page=>$page-1),
4302                                 -accesskey => "p", -title => "Alt-p"}, "prev");
4303        } else {
4304                $paging_nav .= "first &sdot; prev";
4305        }
4306
4307        if ($has_next_link) {
4308                $paging_nav .= " &sdot; " .
4309                        $cgi->a({-href => href(-replay=>1, page=>$page+1),
4310                                 -accesskey => "n", -title => "Alt-n"}, "next");
4311        } else {
4312                $paging_nav .= " &sdot; next";
4313        }
4314
4315        return $paging_nav;
4316}
4317
4318## ......................................................................
4319## functions printing or outputting HTML: div
4320
4321sub git_print_header_div {
4322        my ($action, $title, $hash, $hash_base) = @_;
4323        my %args = ();
4324
4325        $args{'action'} = $action;
4326        $args{'hash'} = $hash if $hash;
4327        $args{'hash_base'} = $hash_base if $hash_base;
4328
4329        print "<div class=\"header\">\n" .
4330              $cgi->a({-href => href(%args), -class => "title"},
4331              $title ? $title : $action) .
4332              "\n</div>\n";
4333}
4334
4335sub format_repo_url {
4336        my ($name, $url) = @_;
4337        return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4338}
4339
4340# Group output by placing it in a DIV element and adding a header.
4341# Options for start_div() can be provided by passing a hash reference as the
4342# first parameter to the function.
4343# Options to git_print_header_div() can be provided by passing an array
4344# reference. This must follow the options to start_div if they are present.
4345# The content can be a scalar, which is output as-is, a scalar reference, which
4346# is output after html escaping, an IO handle passed either as *handle or
4347# *handle{IO}, or a function reference. In the latter case all following
4348# parameters will be taken as argument to the content function call.
4349sub git_print_section {
4350        my ($div_args, $header_args, $content);
4351        my $arg = shift;
4352        if (ref($arg) eq 'HASH') {
4353                $div_args = $arg;
4354                $arg = shift;
4355        }
4356        if (ref($arg) eq 'ARRAY') {
4357                $header_args = $arg;
4358                $arg = shift;
4359        }
4360        $content = $arg;
4361
4362        print $cgi->start_div($div_args);
4363        git_print_header_div(@$header_args);
4364
4365        if (ref($content) eq 'CODE') {
4366                $content->(@_);
4367        } elsif (ref($content) eq 'SCALAR') {
4368                print esc_html($$content);
4369        } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4370                print <$content>;
4371        } elsif (!ref($content) && defined($content)) {
4372                print $content;
4373        }
4374
4375        print $cgi->end_div;
4376}
4377
4378sub format_timestamp_html {
4379        my $date = shift;
4380        my $strtime = $date->{'rfc2822'};
4381
4382        my (undef, undef, $datetime_class) =
4383                gitweb_get_feature('javascript-timezone');
4384        if ($datetime_class) {
4385                $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4386        }
4387
4388        my $localtime_format = '(%02d:%02d %s)';
4389        if ($date->{'hour_local'} < 6) {
4390                $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4391        }
4392        $strtime .= ' ' .
4393                    sprintf($localtime_format,
4394                            $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4395
4396        return $strtime;
4397}
4398
4399# Outputs the author name and date in long form
4400sub git_print_authorship {
4401        my $co = shift;
4402        my %opts = @_;
4403        my $tag = $opts{-tag} || 'div';
4404        my $author = $co->{'author_name'};
4405
4406        my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4407        print "<$tag class=\"author_date\">" .
4408              format_search_author($author, "author", esc_html($author)) .
4409              " [".format_timestamp_html(\%ad)."]".
4410              git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4411              "</$tag>\n";
4412}
4413
4414# Outputs table rows containing the full author or committer information,
4415# in the format expected for 'commit' view (& similar).
4416# Parameters are a commit hash reference, followed by the list of people
4417# to output information for. If the list is empty it defaults to both
4418# author and committer.
4419sub git_print_authorship_rows {
4420        my $co = shift;
4421        # too bad we can't use @people = @_ || ('author', 'committer')
4422        my @people = @_;
4423        @people = ('author', 'committer') unless @people;
4424        foreach my $who (@people) {
4425                my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4426                print "<tr><td>$who</td><td>" .
4427                      format_search_author($co->{"${who}_name"}, $who,
4428                                           esc_html($co->{"${who}_name"})) . " " .
4429                      format_search_author($co->{"${who}_email"}, $who,
4430                                           esc_html("<" . $co->{"${who}_email"} . ">")) .
4431                      "</td><td rowspan=\"2\">" .
4432                      git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4433                      "</td></tr>\n" .
4434                      "<tr>" .
4435                      "<td></td><td>" .
4436                      format_timestamp_html(\%wd) .
4437                      "</td>" .
4438                      "</tr>\n";
4439        }
4440}
4441
4442sub git_print_page_path {
4443        my $name = shift;
4444        my $type = shift;
4445        my $hb = shift;
4446
4447
4448        print "<div class=\"page_path\">";
4449        print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4450                      -title => 'tree root'}, to_utf8("[$project]"));
4451        print " / ";
4452        if (defined $name) {
4453                my @dirname = split '/', $name;
4454                my $basename = pop @dirname;
4455                my $fullname = '';
4456
4457                foreach my $dir (@dirname) {
4458                        $fullname .= ($fullname ? '/' : '') . $dir;
4459                        print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4460                                                     hash_base=>$hb),
4461                                      -title => $fullname}, esc_path($dir));
4462                        print " / ";
4463                }
4464                if (defined $type && $type eq 'blob') {
4465                        print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4466                                                     hash_base=>$hb),
4467                                      -title => $name}, esc_path($basename));
4468                } elsif (defined $type && $type eq 'tree') {
4469                        print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4470                                                     hash_base=>$hb),
4471                                      -title => $name}, esc_path($basename));
4472                        print " / ";
4473                } else {
4474                        print esc_path($basename);
4475                }
4476        }
4477        print "<br/></div>\n";
4478}
4479
4480sub git_print_log {
4481        my $log = shift;
4482        my %opts = @_;
4483
4484        if ($opts{'-remove_title'}) {
4485                # remove title, i.e. first line of log
4486                shift @$log;
4487        }
4488        # remove leading empty lines
4489        while (defined $log->[0] && $log->[0] eq "") {
4490                shift @$log;
4491        }
4492
4493        # print log
4494        my $skip_blank_line = 0;
4495        foreach my $line (@$log) {
4496                if ($line =~ m/^\s*([A-Z][-A-Za-z]*-[Bb]y|C[Cc]): /) {
4497                        if (! $opts{'-remove_signoff'}) {
4498                                print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4499                                $skip_blank_line = 1;
4500                        }
4501                        next;
4502                }
4503
4504                if ($line =~ m,\s*([a-z]*link): (https?://\S+),i) {
4505                        if (! $opts{'-remove_signoff'}) {
4506                                print "<span class=\"signoff\">" . esc_html($1) . ": " .
4507                                        "<a href=\"" . esc_html($2) . "\">" . esc_html($2) . "</a>" .
4508                                        "</span><br/>\n";
4509                                $skip_blank_line = 1;
4510                        }
4511                        next;
4512                }
4513
4514                # print only one empty line
4515                # do not print empty line after signoff
4516                if ($line eq "") {
4517                        next if ($skip_blank_line);
4518                        $skip_blank_line = 1;
4519                } else {
4520                        $skip_blank_line = 0;
4521                }
4522
4523                print format_log_line_html($line) . "<br/>\n";
4524        }
4525
4526        if ($opts{'-final_empty_line'}) {
4527                # end with single empty line
4528                print "<br/>\n" unless $skip_blank_line;
4529        }
4530}
4531
4532# return link target (what link points to)
4533sub git_get_link_target {
4534        my $hash = shift;
4535        my $link_target;
4536
4537        # read link
4538        open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4539                or return;
4540        {
4541                local $/ = undef;
4542                $link_target = <$fd>;
4543        }
4544        close $fd
4545                or return;
4546
4547        return $link_target;
4548}
4549
4550# given link target, and the directory (basedir) the link is in,
4551# return target of link relative to top directory (top tree);
4552# return undef if it is not possible (including absolute links).
4553sub normalize_link_target {
4554        my ($link_target, $basedir) = @_;
4555
4556        # absolute symlinks (beginning with '/') cannot be normalized
4557        return if (substr($link_target, 0, 1) eq '/');
4558
4559        # normalize link target to path from top (root) tree (dir)
4560        my $path;
4561        if ($basedir) {
4562                $path = $basedir . '/' . $link_target;
4563        } else {
4564                # we are in top (root) tree (dir)
4565                $path = $link_target;
4566        }
4567
4568        # remove //, /./, and /../
4569        my @path_parts;
4570        foreach my $part (split('/', $path)) {
4571                # discard '.' and ''
4572                next if (!$part || $part eq '.');
4573                # handle '..'
4574                if ($part eq '..') {
4575                        if (@path_parts) {
4576                                pop @path_parts;
4577                        } else {
4578                                # link leads outside repository (outside top dir)
4579                                return;
4580                        }
4581                } else {
4582                        push @path_parts, $part;
4583                }
4584        }
4585        $path = join('/', @path_parts);
4586
4587        return $path;
4588}
4589
4590# print tree entry (row of git_tree), but without encompassing <tr> element
4591sub git_print_tree_entry {
4592        my ($t, $basedir, $hash_base, $have_blame) = @_;
4593
4594        my %base_key = ();
4595        $base_key{'hash_base'} = $hash_base if defined $hash_base;
4596
4597        # The format of a table row is: mode list link.  Where mode is
4598        # the mode of the entry, list is the name of the entry, an href,
4599        # and link is the action links of the entry.
4600
4601        print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4602        if (exists $t->{'size'}) {
4603                print "<td class=\"size\">$t->{'size'}</td>\n";
4604        }
4605        if ($t->{'type'} eq "blob") {
4606                print "<td class=\"list\">" .
4607                        $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4608                                               file_name=>"$basedir$t->{'name'}", %base_key),
4609                                -class => "list"}, esc_path($t->{'name'}));
4610                if (S_ISLNK(oct $t->{'mode'})) {
4611                        my $link_target = git_get_link_target($t->{'hash'});
4612                        if ($link_target) {
4613                                my $norm_target = normalize_link_target($link_target, $basedir);
4614                                if (defined $norm_target) {
4615                                        print " -> " .
4616                                              $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4617                                                                     file_name=>$norm_target),
4618                                                       -title => $norm_target}, esc_path($link_target));
4619                                } else {
4620                                        print " -> " . esc_path($link_target);
4621                                }
4622                        }
4623                }
4624                print "</td>\n";
4625                print "<td class=\"link\">";
4626                print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4627                                             file_name=>"$basedir$t->{'name'}", %base_key)},
4628                              "blob");
4629                if ($have_blame) {
4630                        print " | " .
4631                              $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4632                                                     file_name=>"$basedir$t->{'name'}", %base_key)},
4633                                      "blame");
4634                }
4635                if (defined $hash_base) {
4636                        print " | " .
4637                              $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4638                                                     hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4639                                      "history");
4640                }
4641                print " | " .
4642                        $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4643                                               file_name=>"$basedir$t->{'name'}")},
4644                                "raw");
4645                print "</td>\n";
4646
4647        } elsif ($t->{'type'} eq "tree") {
4648                print "<td class=\"list\">";
4649                print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4650                                             file_name=>"$basedir$t->{'name'}",
4651                                             %base_key)},
4652                              esc_path($t->{'name'}));
4653                print "</td>\n";
4654                print "<td class=\"link\">";
4655                print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4656                                             file_name=>"$basedir$t->{'name'}",
4657                                             %base_key)},
4658                              "tree");
4659                if (defined $hash_base) {
4660                        print " | " .
4661                              $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4662                                                     file_name=>"$basedir$t->{'name'}")},
4663                                      "history");
4664                }
4665                print "</td>\n";
4666        } else {
4667                # unknown object: we can only present history for it
4668                # (this includes 'commit' object, i.e. submodule support)
4669                print "<td class=\"list\">" .
4670                      esc_path($t->{'name'}) .
4671                      "</td>\n";
4672                print "<td class=\"link\">";
4673                if (defined $hash_base) {
4674                        print $cgi->a({-href => href(action=>"history",
4675                                                     hash_base=>$hash_base,
4676                                                     file_name=>"$basedir$t->{'name'}")},
4677                                      "history");
4678                }
4679                print "</td>\n";
4680        }
4681}
4682
4683## ......................................................................
4684## functions printing large fragments of HTML
4685
4686# get pre-image filenames for merge (combined) diff
4687sub fill_from_file_info {
4688        my ($diff, @parents) = @_;
4689
4690        $diff->{'from_file'} = [ ];
4691        $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4692        for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4693                if ($diff->{'status'}[$i] eq 'R' ||
4694                    $diff->{'status'}[$i] eq 'C') {
4695                        $diff->{'from_file'}[$i] =
4696                                git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4697                }
4698        }
4699
4700        return $diff;
4701}
4702
4703# is current raw difftree line of file deletion
4704sub is_deleted {
4705        my $diffinfo = shift;
4706
4707        return $diffinfo->{'to_id'} eq ('0' x 40);
4708}
4709
4710# does patch correspond to [previous] difftree raw line
4711# $diffinfo  - hashref of parsed raw diff format
4712# $patchinfo - hashref of parsed patch diff format
4713#              (the same keys as in $diffinfo)
4714sub is_patch_split {
4715        my ($diffinfo, $patchinfo) = @_;
4716
4717        return defined $diffinfo && defined $patchinfo
4718                && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4719}
4720
4721
4722sub git_difftree_body {
4723        my ($difftree, $hash, @parents) = @_;
4724        my ($parent) = $parents[0];
4725        my $have_blame = gitweb_check_feature('blame');
4726        print "<div class=\"list_head\">\n";
4727        if ($#{$difftree} > 10) {
4728                print(($#{$difftree} + 1) . " files changed:\n");
4729        }
4730        print "</div>\n";
4731
4732        print "<table class=\"" .
4733              (@parents > 1 ? "combined " : "") .
4734              "diff_tree\">\n";
4735
4736        # header only for combined diff in 'commitdiff' view
4737        my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4738        if ($has_header) {
4739                # table header
4740                print "<thead><tr>\n" .
4741                       "<th></th><th></th>\n"; # filename, patchN link
4742                for (my $i = 0; $i < @parents; $i++) {
4743                        my $par = $parents[$i];
4744                        print "<th>" .
4745                              $cgi->a({-href => href(action=>"commitdiff",
4746                                                     hash=>$hash, hash_parent=>$par),
4747                                       -title => 'commitdiff to parent number ' .
4748                                                  ($i+1) . ': ' . substr($par,0,7)},
4749                                      $i+1) .
4750                              "&nbsp;</th>\n";
4751                }
4752                print "</tr></thead>\n<tbody>\n";
4753        }
4754
4755        my $alternate = 1;
4756        my $patchno = 0;
4757        foreach my $line (@{$difftree}) {
4758                my $diff = parsed_difftree_line($line);
4759
4760                if ($alternate) {
4761                        print "<tr class=\"dark\">\n";
4762                } else {
4763                        print "<tr class=\"light\">\n";
4764                }
4765                $alternate ^= 1;
4766
4767                if (exists $diff->{'nparents'}) { # combined diff
4768
4769                        fill_from_file_info($diff, @parents)
4770                                unless exists $diff->{'from_file'};
4771
4772                        if (!is_deleted($diff)) {
4773                                # file exists in the result (child) commit
4774                                print "<td>" .
4775                                      $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4776                                                             file_name=>$diff->{'to_file'},
4777                                                             hash_base=>$hash),
4778                                              -class => "list"}, esc_path($diff->{'to_file'})) .
4779                                      "</td>\n";
4780                        } else {
4781                                print "<td>" .
4782                                      esc_path($diff->{'to_file'}) .
4783                                      "</td>\n";
4784                        }
4785
4786                        if ($action eq 'commitdiff') {
4787                                # link to patch
4788                                $patchno++;
4789                                print "<td class=\"link\">" .
4790                                      $cgi->a({-href => href(-anchor=>"patch$patchno")},
4791                                              "patch") .
4792                                      " | " .
4793                                      "</td>\n";
4794                        }
4795
4796                        my $has_history = 0;
4797                        my $not_deleted = 0;
4798                        for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4799                                my $hash_parent = $parents[$i];
4800                                my $from_hash = $diff->{'from_id'}[$i];
4801                                my $from_path = $diff->{'from_file'}[$i];
4802                                my $status = $diff->{'status'}[$i];
4803
4804                                $has_history ||= ($status ne 'A');
4805                                $not_deleted ||= ($status ne 'D');
4806
4807                                if ($status eq 'A') {
4808                                        print "<td  class=\"link\" align=\"right\"> | </td>\n";
4809                                } elsif ($status eq 'D') {
4810                                        print "<td class=\"link\">" .
4811                                              $cgi->a({-href => href(action=>"blob",
4812                                                                     hash_base=>$hash,
4813                                                                     hash=>$from_hash,
4814                                                                     file_name=>$from_path)},
4815                                                      "blob" . ($i+1)) .
4816                                              " | </td>\n";
4817                                } else {
4818                                        if ($diff->{'to_id'} eq $from_hash) {
4819                                                print "<td class=\"link nochange\">";
4820                                        } else {
4821                                                print "<td class=\"link\">";
4822                                        }
4823                                        print $cgi->a({-href => href(action=>"blobdiff",
4824                                                                     hash=>$diff->{'to_id'},
4825                                                                     hash_parent=>$from_hash,
4826                                                                     hash_base=>$hash,
4827                                                                     hash_parent_base=>$hash_parent,
4828                                                                     file_name=>$diff->{'to_file'},
4829                                                                     file_parent=>$from_path)},
4830                                                      "diff" . ($i+1)) .
4831                                              " | </td>\n";
4832                                }
4833                        }
4834
4835                        print "<td class=\"link\">";
4836                        if ($not_deleted) {
4837                                print $cgi->a({-href => href(action=>"blob",
4838                                                             hash=>$diff->{'to_id'},
4839                                                             file_name=>$diff->{'to_file'},
4840                                                             hash_base=>$hash)},
4841                                              "blob");
4842                                print " | " if ($has_history);
4843                        }
4844                        if ($has_history) {
4845                                print $cgi->a({-href => href(action=>"history",
4846                                                             file_name=>$diff->{'to_file'},
4847                                                             hash_base=>$hash)},
4848                                              "history");
4849                        }
4850                        print "</td>\n";
4851
4852                        print "</tr>\n";
4853                        next; # instead of 'else' clause, to avoid extra indent
4854                }
4855                # else ordinary diff
4856
4857                my ($to_mode_oct, $to_mode_str, $to_file_type);
4858                my ($from_mode_oct, $from_mode_str, $from_file_type);
4859                if ($diff->{'to_mode'} ne ('0' x 6)) {
4860                        $to_mode_oct = oct $diff->{'to_mode'};
4861                        if (S_ISREG($to_mode_oct)) { # only for regular file
4862                                $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4863                        }
4864                        $to_file_type = file_type($diff->{'to_mode'});
4865                }
4866                if ($diff->{'from_mode'} ne ('0' x 6)) {
4867                        $from_mode_oct = oct $diff->{'from_mode'};
4868                        if (S_ISREG($from_mode_oct)) { # only for regular file
4869                                $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4870                        }
4871                        $from_file_type = file_type($diff->{'from_mode'});
4872                }
4873
4874                if ($diff->{'status'} eq "A") { # created
4875                        my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4876                        $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4877                        $mode_chng   .= "]</span>";
4878                        print "<td>";
4879                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4880                                                     hash_base=>$hash, file_name=>$diff->{'file'}),
4881                                      -class => "list"}, esc_path($diff->{'file'}));
4882                        print "</td>\n";
4883                        print "<td>$mode_chng</td>\n";
4884                        print "<td class=\"link\">";
4885                        if ($action eq 'commitdiff') {
4886                                # link to patch
4887                                $patchno++;
4888                                print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4889                                              "patch") .
4890                                      " | ";
4891                        }
4892                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4893                                                     hash_base=>$hash, file_name=>$diff->{'file'})},
4894                                      "blob");
4895                        print "</td>\n";
4896
4897                } elsif ($diff->{'status'} eq "D") { # deleted
4898                        my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4899                        print "<td>";
4900                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4901                                                     hash_base=>$parent, file_name=>$diff->{'file'}),
4902                                       -class => "list"}, esc_path($diff->{'file'}));
4903                        print "</td>\n";
4904                        print "<td>$mode_chng</td>\n";
4905                        print "<td class=\"link\">";
4906                        if ($action eq 'commitdiff') {
4907                                # link to patch
4908                                $patchno++;
4909                                print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4910                                              "patch") .
4911                                      " | ";
4912                        }
4913                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4914                                                     hash_base=>$parent, file_name=>$diff->{'file'})},
4915                                      "blob") . " | ";
4916                        if ($have_blame) {
4917                                print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4918                                                             file_name=>$diff->{'file'})},
4919                                              "blame") . " | ";
4920                        }
4921                        print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4922                                                     file_name=>$diff->{'file'})},
4923                                      "history");
4924                        print "</td>\n";
4925
4926                } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4927                        my $mode_chnge = "";
4928                        if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4929                                $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4930                                if ($from_file_type ne $to_file_type) {
4931                                        $mode_chnge .= " from $from_file_type to $to_file_type";
4932                                }
4933                                if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4934                                        if ($from_mode_str && $to_mode_str) {
4935                                                $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4936                                        } elsif ($to_mode_str) {
4937                                                $mode_chnge .= " mode: $to_mode_str";
4938                                        }
4939                                }
4940                                $mode_chnge .= "]</span>\n";
4941                        }
4942                        print "<td>";
4943                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4944                                                     hash_base=>$hash, file_name=>$diff->{'file'}),
4945                                      -class => "list"}, esc_path($diff->{'file'}));
4946                        print "</td>\n";
4947                        print "<td>$mode_chnge</td>\n";
4948                        print "<td class=\"link\">";
4949                        if ($action eq 'commitdiff') {
4950                                # link to patch
4951                                $patchno++;
4952                                print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4953                                              "patch") .
4954                                      " | ";
4955                        } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4956                                # "commit" view and modified file (not onlu mode changed)
4957                                print $cgi->a({-href => href(action=>"blobdiff",
4958                                                             hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4959                                                             hash_base=>$hash, hash_parent_base=>$parent,
4960                                                             file_name=>$diff->{'file'})},
4961                                              "diff") .
4962                                      " | ";
4963                        }
4964                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4965                                                     hash_base=>$hash, file_name=>$diff->{'file'})},
4966                                       "blob") . " | ";
4967                        if ($have_blame) {
4968                                print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4969                                                             file_name=>$diff->{'file'})},
4970                                              "blame") . " | ";
4971                        }
4972                        print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4973                                                     file_name=>$diff->{'file'})},
4974                                      "history");
4975                        print "</td>\n";
4976
4977                } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4978                        my %status_name = ('R' => 'moved', 'C' => 'copied');
4979                        my $nstatus = $status_name{$diff->{'status'}};
4980                        my $mode_chng = "";
4981                        if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4982                                # mode also for directories, so we cannot use $to_mode_str
4983                                $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4984                        }
4985                        print "<td>" .
4986                              $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4987                                                     hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4988                                      -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4989                              "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4990                              $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4991                                                     hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4992                                      -class => "list"}, esc_path($diff->{'from_file'})) .
4993                              " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4994                              "<td class=\"link\">";
4995                        if ($action eq 'commitdiff') {
4996                                # link to patch
4997                                $patchno++;
4998                                print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4999                                              "patch") .
5000                                      " | ";
5001                        } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5002                                # "commit" view and modified file (not only pure rename or copy)
5003                                print $cgi->a({-href => href(action=>"blobdiff",
5004                                                             hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5005                                                             hash_base=>$hash, hash_parent_base=>$parent,
5006                                                             file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
5007                                              "diff") .
5008                                      " | ";
5009                        }
5010                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5011                                                     hash_base=>$parent, file_name=>$diff->{'to_file'})},
5012                                      "blob") . " | ";
5013                        if ($have_blame) {
5014                                print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5015                                                             file_name=>$diff->{'to_file'})},
5016                                              "blame") . " | ";
5017                        }
5018                        print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5019                                                    file_name=>$diff->{'to_file'})},
5020                                      "history");
5021                        print "</td>\n";
5022
5023                } # we should not encounter Unmerged (U) or Unknown (X) status
5024                print "</tr>\n";
5025        }
5026        print "</tbody>" if $has_header;
5027        print "</table>\n";
5028}
5029
5030# Print context lines and then rem/add lines in a side-by-side manner.
5031sub print_sidebyside_diff_lines {
5032        my ($ctx, $rem, $add) = @_;
5033
5034        # print context block before add/rem block
5035        if (@$ctx) {
5036                print join '',
5037                        '<div class="chunk_block ctx">',
5038                                '<div class="old">',
5039                                @$ctx,
5040                                '</div>',
5041                                '<div class="new">',
5042                                @$ctx,
5043                                '</div>',
5044                        '</div>';
5045        }
5046
5047        if (!@$add) {
5048                # pure removal
5049                print join '',
5050                        '<div class="chunk_block rem">',
5051                                '<div class="old">',
5052                                @$rem,
5053                                '</div>',
5054                        '</div>';
5055        } elsif (!@$rem) {
5056                # pure addition
5057                print join '',
5058                        '<div class="chunk_block add">',
5059                                '<div class="new">',
5060                                @$add,
5061                                '</div>',
5062                        '</div>';
5063        } else {
5064                print join '',
5065                        '<div class="chunk_block chg">',
5066                                '<div class="old">',
5067                                @$rem,
5068                                '</div>',
5069                                '<div class="new">',
5070                                @$add,
5071                                '</div>',
5072                        '</div>';
5073        }
5074}
5075
5076# Print context lines and then rem/add lines in inline manner.
5077sub print_inline_diff_lines {
5078        my ($ctx, $rem, $add) = @_;
5079
5080        print @$ctx, @$rem, @$add;
5081}
5082
5083# Format removed and added line, mark changed part and HTML-format them.
5084# Implementation is based on contrib/diff-highlight
5085sub format_rem_add_lines_pair {
5086        my ($rem, $add, $num_parents) = @_;
5087
5088        # We need to untabify lines before split()'ing them;
5089        # otherwise offsets would be invalid.
5090        chomp $rem;
5091        chomp $add;
5092        $rem = untabify($rem);
5093        $add = untabify($add);
5094
5095        my @rem = split(//, $rem);
5096        my @add = split(//, $add);
5097        my ($esc_rem, $esc_add);
5098        # Ignore leading +/- characters for each parent.
5099        my ($prefix_len, $suffix_len) = ($num_parents, 0);
5100        my ($prefix_has_nonspace, $suffix_has_nonspace);
5101
5102        my $shorter = (@rem < @add) ? @rem : @add;
5103        while ($prefix_len < $shorter) {
5104                last if ($rem[$prefix_len] ne $add[$prefix_len]);
5105
5106                $prefix_has_nonspace = 1 if ($rem[$prefix_len] !~ /\s/);
5107                $prefix_len++;
5108        }
5109
5110        while ($prefix_len + $suffix_len < $shorter) {
5111                last if ($rem[-1 - $suffix_len] ne $add[-1 - $suffix_len]);
5112
5113                $suffix_has_nonspace = 1 if ($rem[-1 - $suffix_len] !~ /\s/);
5114                $suffix_len++;
5115        }
5116
5117        # Mark lines that are different from each other, but have some common
5118        # part that isn't whitespace.  If lines are completely different, don't
5119        # mark them because that would make output unreadable, especially if
5120        # diff consists of multiple lines.
5121        if ($prefix_has_nonspace || $suffix_has_nonspace) {
5122                $esc_rem = esc_html_hl_regions($rem, 'marked',
5123                        [$prefix_len, @rem - $suffix_len], -nbsp=>1);
5124                $esc_add = esc_html_hl_regions($add, 'marked',
5125                        [$prefix_len, @add - $suffix_len], -nbsp=>1);
5126        } else {
5127                $esc_rem = esc_html($rem, -nbsp=>1);
5128                $esc_add = esc_html($add, -nbsp=>1);
5129        }
5130
5131        return format_diff_line(\$esc_rem, 'rem'),
5132               format_diff_line(\$esc_add, 'add');
5133}
5134
5135# HTML-format diff context, removed and added lines.
5136sub format_ctx_rem_add_lines {
5137        my ($ctx, $rem, $add, $num_parents) = @_;
5138        my (@new_ctx, @new_rem, @new_add);
5139        my $can_highlight = 0;
5140        my $is_combined = ($num_parents > 1);
5141
5142        # Highlight if every removed line has a corresponding added line.
5143        if (@$add > 0 && @$add == @$rem) {
5144                $can_highlight = 1;
5145
5146                # Highlight lines in combined diff only if the chunk contains
5147                # diff between the same version, e.g.
5148                #
5149                #    - a
5150                #   -  b
5151                #    + c
5152                #   +  d
5153                #
5154                # Otherwise the highlightling would be confusing.
5155                if ($is_combined) {
5156                        for (my $i = 0; $i < @$add; $i++) {
5157                                my $prefix_rem = substr($rem->[$i], 0, $num_parents);
5158                                my $prefix_add = substr($add->[$i], 0, $num_parents);
5159
5160                                $prefix_rem =~ s/-/+/g;
5161
5162                                if ($prefix_rem ne $prefix_add) {
5163                                        $can_highlight = 0;
5164                                        last;
5165                                }
5166                        }
5167                }
5168        }
5169
5170        if ($can_highlight) {
5171                for (my $i = 0; $i < @$add; $i++) {
5172                        my ($line_rem, $line_add) = format_rem_add_lines_pair(
5173                                $rem->[$i], $add->[$i], $num_parents);
5174                        push @new_rem, $line_rem;
5175                        push @new_add, $line_add;
5176                }
5177        } else {
5178                @new_rem = map { format_diff_line($_, 'rem') } @$rem;
5179                @new_add = map { format_diff_line($_, 'add') } @$add;
5180        }
5181
5182        @new_ctx = map { format_diff_line($_, 'ctx') } @$ctx;
5183
5184        return (\@new_ctx, \@new_rem, \@new_add);
5185}
5186
5187# Print context lines and then rem/add lines.
5188sub print_diff_lines {
5189        my ($ctx, $rem, $add, $diff_style, $num_parents) = @_;
5190        my $is_combined = $num_parents > 1;
5191
5192        ($ctx, $rem, $add) = format_ctx_rem_add_lines($ctx, $rem, $add,
5193                $num_parents);
5194
5195        if ($diff_style eq 'sidebyside' && !$is_combined) {
5196                print_sidebyside_diff_lines($ctx, $rem, $add);
5197        } else {
5198                # default 'inline' style and unknown styles
5199                print_inline_diff_lines($ctx, $rem, $add);
5200        }
5201}
5202
5203sub print_diff_chunk {
5204        my ($diff_style, $num_parents, $from, $to, @chunk) = @_;
5205        my (@ctx, @rem, @add);
5206
5207        # The class of the previous line.
5208        my $prev_class = '';
5209
5210        return unless @chunk;
5211
5212        # incomplete last line might be among removed or added lines,
5213        # or both, or among context lines: find which
5214        for (my $i = 1; $i < @chunk; $i++) {
5215                if ($chunk[$i][0] eq 'incomplete') {
5216                        $chunk[$i][0] = $chunk[$i-1][0];
5217                }
5218        }
5219
5220        # guardian
5221        push @chunk, ["", ""];
5222
5223        foreach my $line_info (@chunk) {
5224                my ($class, $line) = @$line_info;
5225
5226                # print chunk headers
5227                if ($class && $class eq 'chunk_header') {
5228                        print format_diff_line($line, $class, $from, $to);
5229                        next;
5230                }
5231
5232                ## print from accumulator when have some add/rem lines or end
5233                # of chunk (flush context lines), or when have add and rem
5234                # lines and new block is reached (otherwise add/rem lines could
5235                # be reordered)
5236                if (!$class || ((@rem || @add) && $class eq 'ctx') ||
5237                    (@rem && @add && $class ne $prev_class)) {
5238                        print_diff_lines(\@ctx, \@rem, \@add,
5239                                         $diff_style, $num_parents);
5240                        @ctx = @rem = @add = ();
5241                }
5242
5243                ## adding lines to accumulator
5244                # guardian value
5245                last unless $line;
5246                # rem, add or change
5247                if ($class eq 'rem') {
5248                        push @rem, $line;
5249                } elsif ($class eq 'add') {
5250                        push @add, $line;
5251                }
5252                # context line
5253                if ($class eq 'ctx') {
5254                        push @ctx, $line;
5255                }
5256
5257                $prev_class = $class;
5258        }
5259}
5260
5261sub git_patchset_body {
5262        my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
5263        my ($hash_parent) = $hash_parents[0];
5264
5265        my $is_combined = (@hash_parents > 1);
5266        my $patch_idx = 0;
5267        my $patch_number = 0;
5268        my $patch_line;
5269        my $diffinfo;
5270        my $to_name;
5271        my (%from, %to);
5272        my @chunk; # for side-by-side diff
5273
5274        print "<div class=\"patchset\">\n";
5275
5276        # skip to first patch
5277        while ($patch_line = <$fd>) {
5278                chomp $patch_line;
5279
5280                last if ($patch_line =~ m/^diff /);
5281        }
5282
5283 PATCH:
5284        while ($patch_line) {
5285
5286                # parse "git diff" header line
5287                if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5288                        # $1 is from_name, which we do not use
5289                        $to_name = unquote($2);
5290                        $to_name =~ s!^b/!!;
5291                } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5292                        # $1 is 'cc' or 'combined', which we do not use
5293                        $to_name = unquote($2);
5294                } else {
5295                        $to_name = undef;
5296                }
5297
5298                # check if current patch belong to current raw line
5299                # and parse raw git-diff line if needed
5300                if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5301                        # this is continuation of a split patch
5302                        print "<div class=\"patch cont\">\n";
5303                } else {
5304                        # advance raw git-diff output if needed
5305                        $patch_idx++ if defined $diffinfo;
5306
5307                        # read and prepare patch information
5308                        $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5309
5310                        # compact combined diff output can have some patches skipped
5311                        # find which patch (using pathname of result) we are at now;
5312                        if ($is_combined) {
5313                                while ($to_name ne $diffinfo->{'to_file'}) {
5314                                        print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5315                                              format_diff_cc_simplified($diffinfo, @hash_parents) .
5316                                              "</div>\n";  # class="patch"
5317
5318                                        $patch_idx++;
5319                                        $patch_number++;
5320
5321                                        last if $patch_idx > $#$difftree;
5322                                        $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5323                                }
5324                        }
5325
5326                        # modifies %from, %to hashes
5327                        parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5328
5329                        # this is first patch for raw difftree line with $patch_idx index
5330                        # we index @$difftree array from 0, but number patches from 1
5331                        print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5332                }
5333
5334                # git diff header
5335                #assert($patch_line =~ m/^diff /) if DEBUG;
5336                #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5337                $patch_number++;
5338                # print "git diff" header
5339                print format_git_diff_header_line($patch_line, $diffinfo,
5340                                                  \%from, \%to);
5341
5342                # print extended diff header
5343                print "<div class=\"diff extended_header\">\n";
5344        EXTENDED_HEADER:
5345                while ($patch_line = <$fd>) {
5346                        chomp $patch_line;
5347
5348                        last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5349
5350                        print format_extended_diff_header_line($patch_line, $diffinfo,
5351                                                               \%from, \%to);
5352                }
5353                print "</div>\n"; # class="diff extended_header"
5354
5355                # from-file/to-file diff header
5356                if (! $patch_line) {
5357                        print "</div>\n"; # class="patch"
5358                        last PATCH;
5359                }
5360                next PATCH if ($patch_line =~ m/^diff /);
5361                #assert($patch_line =~ m/^---/) if DEBUG;
5362
5363                my $last_patch_line = $patch_line;
5364                $patch_line = <$fd>;
5365                chomp $patch_line;
5366                #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5367
5368                print format_diff_from_to_header($last_patch_line, $patch_line,
5369                                                 $diffinfo, \%from, \%to,
5370                                                 @hash_parents);
5371
5372                # the patch itself
5373        LINE:
5374                while ($patch_line = <$fd>) {
5375                        chomp $patch_line;
5376
5377                        next PATCH if ($patch_line =~ m/^diff /);
5378
5379                        my $class = diff_line_class($patch_line, \%from, \%to);
5380
5381                        if ($class eq 'chunk_header') {
5382                                print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5383                                @chunk = ();
5384                        }
5385
5386                        push @chunk, [ $class, $patch_line ];
5387                }
5388
5389        } continue {
5390                if (@chunk) {
5391                        print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5392                        @chunk = ();
5393                }
5394                print "</div>\n"; # class="patch"
5395        }
5396
5397        # for compact combined (--cc) format, with chunk and patch simplification
5398        # the patchset might be empty, but there might be unprocessed raw lines
5399        for (++$patch_idx if $patch_number > 0;
5400             $patch_idx < @$difftree;
5401             ++$patch_idx) {
5402                # read and prepare patch information
5403                $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5404
5405                # generate anchor for "patch" links in difftree / whatchanged part
5406                print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5407                      format_diff_cc_simplified($diffinfo, @hash_parents) .
5408                      "</div>\n";  # class="patch"
5409
5410                $patch_number++;
5411        }
5412
5413        if ($patch_number == 0) {
5414                if (@hash_parents > 1) {
5415                        print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5416                } else {
5417                        print "<div class=\"diff nodifferences\">No differences found</div>\n";
5418                }
5419        }
5420
5421        print "</div>\n"; # class="patchset"
5422}
5423
5424# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5425
5426sub git_project_search_form {
5427        my ($searchtext, $search_use_regexp) = @_;
5428
5429        my $limit = '';
5430        if ($project_filter) {
5431                $limit = " in '$project_filter/'";
5432        }
5433
5434        print "<div class=\"projsearch\">\n";
5435        print $cgi->startform(-method => 'get', -action => $my_uri) .
5436              $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5437        print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5438                if (defined $project_filter);
5439        print $cgi->textfield(-name => 's', -value => $searchtext,
5440                              -title => "Search project by name and description$limit",
5441                              -size => 60) . "\n" .
5442              "<span title=\"Extended regular expression\">" .
5443              $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5444                             -checked => $search_use_regexp) .
5445              "</span>\n" .
5446              $cgi->submit(-name => 'btnS', -value => 'Search') .
5447              $cgi->end_form() . "\n" .
5448              $cgi->a({-href => href(project => undef, searchtext => undef,
5449                                     project_filter => $project_filter)},
5450                      esc_html("List all projects$limit")) . "<br />\n";
5451        print "</div>\n";
5452}
5453
5454# entry for given @keys needs filling if at least one of keys in list
5455# is not present in %$project_info
5456sub project_info_needs_filling {
5457        my ($project_info, @keys) = @_;
5458
5459        # return List::MoreUtils::any { !exists $project_info->{$_} } @keys;
5460        foreach my $key (@keys) {
5461                if (!exists $project_info->{$key}) {
5462                        return 1;
5463                }
5464        }
5465        return;
5466}
5467
5468# fills project list info (age, description, owner, category, forks, etc.)
5469# for each project in the list, removing invalid projects from
5470# returned list, or fill only specified info.
5471#
5472# Invalid projects are removed from the returned list if and only if you
5473# ask 'age' or 'age_string' to be filled, because they are the only fields
5474# that run unconditionally git command that requires repository, and
5475# therefore do always check if project repository is invalid.
5476#
5477# USAGE:
5478# * fill_project_list_info(\@project_list, 'descr_long', 'ctags')
5479#   ensures that 'descr_long' and 'ctags' fields are filled
5480# * @project_list = fill_project_list_info(\@project_list)
5481#   ensures that all fields are filled (and invalid projects removed)
5482#
5483# NOTE: modifies $projlist, but does not remove entries from it
5484sub fill_project_list_info {
5485        my ($projlist, @wanted_keys) = @_;
5486        my @projects;
5487        my $filter_set = sub { return @_; };
5488        if (@wanted_keys) {
5489                my %wanted_keys = map { $_ => 1 } @wanted_keys;
5490                $filter_set = sub { return grep { $wanted_keys{$_} } @_; };
5491        }
5492
5493        my $show_ctags = gitweb_check_feature('ctags');
5494 PROJECT:
5495        foreach my $pr (@$projlist) {
5496                if (project_info_needs_filling($pr, $filter_set->('age', 'age_string'))) {
5497                        my (@activity) = git_get_last_activity($pr->{'path'});
5498                        unless (@activity) {
5499                                next PROJECT;
5500                        }
5501                        ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5502                }
5503                if (project_info_needs_filling($pr, $filter_set->('descr', 'descr_long'))) {
5504                        my $descr = git_get_project_description($pr->{'path'}) || "";
5505                        $descr = to_utf8($descr);
5506                        $pr->{'descr_long'} = $descr;
5507                        $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5508                }
5509                if (project_info_needs_filling($pr, $filter_set->('owner'))) {
5510                        $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5511                }
5512                if ($show_ctags &&
5513                    project_info_needs_filling($pr, $filter_set->('ctags'))) {
5514                        $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5515                }
5516                if ($projects_list_group_categories &&
5517                    project_info_needs_filling($pr, $filter_set->('category'))) {
5518                        my $cat = git_get_project_category($pr->{'path'}) ||
5519                                                           $project_list_default_category;
5520                        $pr->{'category'} = to_utf8($cat);
5521                }
5522
5523                push @projects, $pr;
5524        }
5525
5526        return @projects;
5527}
5528
5529sub sort_projects_list {
5530        my ($projlist, $order) = @_;
5531
5532        sub order_str {
5533                my $key = shift;
5534                return sub { $a->{$key} cmp $b->{$key} };
5535        }
5536
5537        sub order_num_then_undef {
5538                my $key = shift;
5539                return sub {
5540                        defined $a->{$key} ?
5541                                (defined $b->{$key} ? $a->{$key} <=> $b->{$key} : -1) :
5542                                (defined $b->{$key} ? 1 : 0)
5543                };
5544        }
5545
5546        my %orderings = (
5547                project => order_str('path'),
5548                descr => order_str('descr_long'),
5549                owner => order_str('owner'),
5550                age => order_num_then_undef('age'),
5551        );
5552
5553        my $ordering = $orderings{$order};
5554        return defined $ordering ? sort $ordering @$projlist : @$projlist;
5555}
5556
5557# returns a hash of categories, containing the list of project
5558# belonging to each category
5559sub build_projlist_by_category {
5560        my ($projlist, $from, $to) = @_;
5561        my %categories;
5562
5563        $from = 0 unless defined $from;
5564        $to = $#$projlist if (!defined $to || $#$projlist < $to);
5565
5566        for (my $i = $from; $i <= $to; $i++) {
5567                my $pr = $projlist->[$i];
5568                push @{$categories{ $pr->{'category'} }}, $pr;
5569        }
5570
5571        return wantarray ? %categories : \%categories;
5572}
5573
5574# print 'sort by' <th> element, generating 'sort by $name' replay link
5575# if that order is not selected
5576sub print_sort_th {
5577        print format_sort_th(@_);
5578}
5579
5580sub format_sort_th {
5581        my ($name, $order, $header) = @_;
5582        my $sort_th = "";
5583        $header ||= ucfirst($name);
5584
5585        if ($order eq $name) {
5586                $sort_th .= "<th>$header</th>\n";
5587        } else {
5588                $sort_th .= "<th>" .
5589                            $cgi->a({-href => href(-replay=>1, order=>$name),
5590                                     -class => "header"}, $header) .
5591                            "</th>\n";
5592        }
5593
5594        return $sort_th;
5595}
5596
5597sub git_project_list_rows {
5598        my ($projlist, $from, $to, $check_forks) = @_;
5599
5600        $from = 0 unless defined $from;
5601        $to = $#$projlist if (!defined $to || $#$projlist < $to);
5602
5603        my $alternate = 1;
5604        for (my $i = $from; $i <= $to; $i++) {
5605                my $pr = $projlist->[$i];
5606
5607                if ($alternate) {
5608                        print "<tr class=\"dark\">\n";
5609                } else {
5610                        print "<tr class=\"light\">\n";
5611                }
5612                $alternate ^= 1;
5613
5614                if ($check_forks) {
5615                        print "<td>";
5616                        if ($pr->{'forks'}) {
5617                                my $nforks = scalar @{$pr->{'forks'}};
5618                                if ($nforks > 0) {
5619                                        print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5620                                                       -title => "$nforks forks"}, "+");
5621                                } else {
5622                                        print $cgi->span({-title => "$nforks forks"}, "+");
5623                                }
5624                        }
5625                        print "</td>\n";
5626                }
5627                print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5628                                        -class => "list"},
5629                                       esc_html_match_hl($pr->{'path'}, $search_regexp)) .
5630                      "</td>\n" .
5631                      "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5632                                        -class => "list",
5633                                        -title => $pr->{'descr_long'}},
5634                                        $search_regexp
5635                                        ? esc_html_match_hl_chopped($pr->{'descr_long'},
5636                                                                    $pr->{'descr'}, $search_regexp)
5637                                        : esc_html($pr->{'descr'})) .
5638                      "</td>\n";
5639                unless ($omit_owner) {
5640                        print "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5641                }
5642                unless ($omit_age_column) {
5643                        print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5644                            (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n";
5645                }
5646                print"<td class=\"link\">" .
5647                      $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5648                      $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5649                      $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5650                      $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5651                      ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5652                      "</td>\n" .
5653                      "</tr>\n";
5654        }
5655}
5656
5657sub git_project_list_body {
5658        # actually uses global variable $project
5659        my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5660        my @projects = @$projlist;
5661
5662        my $check_forks = gitweb_check_feature('forks');
5663        my $show_ctags  = gitweb_check_feature('ctags');
5664        my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5665        $check_forks = undef
5666                if ($tagfilter || $search_regexp);
5667
5668        # filtering out forks before filling info allows to do less work
5669        @projects = filter_forks_from_projects_list(\@projects)
5670                if ($check_forks);
5671        # search_projects_list pre-fills required info
5672        @projects = search_projects_list(\@projects,
5673                                         'search_regexp' => $search_regexp,
5674                                         'tagfilter'  => $tagfilter)
5675                if ($tagfilter || $search_regexp);
5676        # fill the rest
5677        my @all_fields = ('descr', 'descr_long', 'ctags', 'category');
5678        push @all_fields, ('age', 'age_string') unless($omit_age_column);
5679        push @all_fields, 'owner' unless($omit_owner);
5680        @projects = fill_project_list_info(\@projects, @all_fields);
5681
5682        $order ||= $default_projects_order;
5683        $from = 0 unless defined $from;
5684        $to = $#projects if (!defined $to || $#projects < $to);
5685
5686        # short circuit
5687        if ($from > $to) {
5688                print "<center>\n".
5689                      "<b>No such projects found</b><br />\n".
5690                      "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5691                      "</center>\n<br />\n";
5692                return;
5693        }
5694
5695        @projects = sort_projects_list(\@projects, $order);
5696
5697        if ($show_ctags) {
5698                my $ctags = git_gather_all_ctags(\@projects);
5699                my $cloud = git_populate_project_tagcloud($ctags);
5700                print git_show_project_tagcloud($cloud, 64);
5701        }
5702
5703        print "<table class=\"project_list\">\n";
5704        unless ($no_header) {
5705                print "<tr>\n";
5706                if ($check_forks) {
5707                        print "<th></th>\n";
5708                }
5709                print_sort_th('project', $order, 'Project');
5710                print_sort_th('descr', $order, 'Description');
5711                print_sort_th('owner', $order, 'Owner') unless $omit_owner;
5712                print_sort_th('age', $order, 'Last Change') unless $omit_age_column;
5713                print "<th></th>\n" . # for links
5714                      "</tr>\n";
5715        }
5716
5717        if ($projects_list_group_categories) {
5718                # only display categories with projects in the $from-$to window
5719                @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5720                my %categories = build_projlist_by_category(\@projects, $from, $to);
5721                foreach my $cat (sort keys %categories) {
5722                        unless ($cat eq "") {
5723                                print "<tr>\n";
5724                                if ($check_forks) {
5725                                        print "<td></td>\n";
5726                                }
5727                                print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5728                                print "</tr>\n";
5729                        }
5730
5731                        git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5732                }
5733        } else {
5734                git_project_list_rows(\@projects, $from, $to, $check_forks);
5735        }
5736
5737        if (defined $extra) {
5738                print "<tr>\n";
5739                if ($check_forks) {
5740                        print "<td></td>\n";
5741                }
5742                print "<td colspan=\"5\">$extra</td>\n" .
5743                      "</tr>\n";
5744        }
5745        print "</table>\n";
5746}
5747
5748sub git_log_body {
5749        # uses global variable $project
5750        my ($commitlist, $from, $to, $refs, $extra) = @_;
5751
5752        $from = 0 unless defined $from;
5753        $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5754
5755        for (my $i = 0; $i <= $to; $i++) {
5756                my %co = %{$commitlist->[$i]};
5757                next if !%co;
5758                my $commit = $co{'id'};
5759                my $ref = format_ref_marker($refs, $commit);
5760                git_print_header_div('commit',
5761                               "<span class=\"age\">$co{'age_string'}</span>" .
5762                               esc_html($co{'title'}) . $ref,
5763                               $commit);
5764                print "<div class=\"title_text\">\n" .
5765                      "<div class=\"log_link\">\n" .
5766                      $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5767                      " | " .
5768                      $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5769                      " | " .
5770                      $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5771                      "<br/>\n" .
5772                      "</div>\n";
5773                      git_print_authorship(\%co, -tag => 'span');
5774                      print "<br/>\n</div>\n";
5775
5776                print "<div class=\"log_body\">\n";
5777                git_print_log($co{'comment'}, -final_empty_line=> 1);
5778                print "</div>\n";
5779        }
5780        if ($extra) {
5781                print "<div class=\"page_nav\">\n";
5782                print "$extra\n";
5783                print "</div>\n";
5784        }
5785}
5786
5787sub git_shortlog_body {
5788        # uses global variable $project
5789        my ($commitlist, $from, $to, $refs, $extra) = @_;
5790
5791        $from = 0 unless defined $from;
5792        $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5793
5794        print "<table class=\"shortlog\">\n";
5795        my $alternate = 1;
5796        for (my $i = $from; $i <= $to; $i++) {
5797                my %co = %{$commitlist->[$i]};
5798                my $commit = $co{'id'};
5799                my $ref = format_ref_marker($refs, $commit);
5800                if ($alternate) {
5801                        print "<tr class=\"dark\">\n";
5802                } else {
5803                        print "<tr class=\"light\">\n";
5804                }
5805                $alternate ^= 1;
5806                # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5807                print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5808                      format_author_html('td', \%co, 10) . "<td>";
5809                print format_subject_html($co{'title'}, $co{'title_short'},
5810                                          href(action=>"commit", hash=>$commit), $ref);
5811                print "</td>\n" .
5812                      "<td class=\"link\">" .
5813                      $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5814                      $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5815                      $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5816                my $snapshot_links = format_snapshot_links($commit);
5817                if (defined $snapshot_links) {
5818                        print " | " . $snapshot_links;
5819                }
5820                print "</td>\n" .
5821                      "</tr>\n";
5822        }
5823        if (defined $extra) {
5824                print "<tr>\n" .
5825                      "<td colspan=\"4\">$extra</td>\n" .
5826                      "</tr>\n";
5827        }
5828        print "</table>\n";
5829}
5830
5831sub git_history_body {
5832        # Warning: assumes constant type (blob or tree) during history
5833        my ($commitlist, $from, $to, $refs, $extra,
5834            $file_name, $file_hash, $ftype) = @_;
5835
5836        $from = 0 unless defined $from;
5837        $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5838
5839        print "<table class=\"history\">\n";
5840        my $alternate = 1;
5841        for (my $i = $from; $i <= $to; $i++) {
5842                my %co = %{$commitlist->[$i]};
5843                if (!%co) {
5844                        next;
5845                }
5846                my $commit = $co{'id'};
5847
5848                my $ref = format_ref_marker($refs, $commit);
5849
5850                if ($alternate) {
5851                        print "<tr class=\"dark\">\n";
5852                } else {
5853                        print "<tr class=\"light\">\n";
5854                }
5855                $alternate ^= 1;
5856                print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5857        # shortlog:   format_author_html('td', \%co, 10)
5858                      format_author_html('td', \%co, 15, 3) . "<td>";
5859                # originally git_history used chop_str($co{'title'}, 50)
5860                print format_subject_html($co{'title'}, $co{'title_short'},
5861                                          href(action=>"commit", hash=>$commit), $ref);
5862                print "</td>\n" .
5863                      "<td class=\"link\">" .
5864                      $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5865                      $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5866
5867                if ($ftype eq 'blob') {
5868                        my $blob_current = $file_hash;
5869                        my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5870                        if (defined $blob_current && defined $blob_parent &&
5871                                        $blob_current ne $blob_parent) {
5872                                print " | " .
5873                                        $cgi->a({-href => href(action=>"blobdiff",
5874                                                               hash=>$blob_current, hash_parent=>$blob_parent,
5875                                                               hash_base=>$hash_base, hash_parent_base=>$commit,
5876                                                               file_name=>$file_name)},
5877                                                "diff to current");
5878                        }
5879                }
5880                print "</td>\n" .
5881                      "</tr>\n";
5882        }
5883        if (defined $extra) {
5884                print "<tr>\n" .
5885                      "<td colspan=\"4\">$extra</td>\n" .
5886                      "</tr>\n";
5887        }
5888        print "</table>\n";
5889}
5890
5891sub git_tags_body {
5892        # uses global variable $project
5893        my ($taglist, $from, $to, $extra) = @_;
5894        $from = 0 unless defined $from;
5895        $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5896
5897        print "<table class=\"tags\">\n";
5898        my $alternate = 1;
5899        for (my $i = $from; $i <= $to; $i++) {
5900                my $entry = $taglist->[$i];
5901                my %tag = %$entry;
5902                my $comment = $tag{'subject'};
5903                my $comment_short;
5904                if (defined $comment) {
5905                        $comment_short = chop_str($comment, 30, 5);
5906                }
5907                if ($alternate) {
5908                        print "<tr class=\"dark\">\n";
5909                } else {
5910                        print "<tr class=\"light\">\n";
5911                }
5912                $alternate ^= 1;
5913                if (defined $tag{'age'}) {
5914                        print "<td><i>$tag{'age'}</i></td>\n";
5915                } else {
5916                        print "<td></td>\n";
5917                }
5918                print "<td>" .
5919                      $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5920                               -class => "list name"}, esc_html($tag{'name'})) .
5921                      "</td>\n" .
5922                      "<td>";
5923                if (defined $comment) {
5924                        print format_subject_html($comment, $comment_short,
5925                                                  href(action=>"tag", hash=>$tag{'id'}));
5926                }
5927                print "</td>\n" .
5928                      "<td class=\"selflink\">";
5929                if ($tag{'type'} eq "tag") {
5930                        print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5931                } else {
5932                        print "&nbsp;";
5933                }
5934                print "</td>\n" .
5935                      "<td class=\"link\">" . " | " .
5936                      $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5937                if ($tag{'reftype'} eq "commit") {
5938                        print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5939                              " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5940                } elsif ($tag{'reftype'} eq "blob") {
5941                        print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5942                }
5943                print "</td>\n" .
5944                      "</tr>";
5945        }
5946        if (defined $extra) {
5947                print "<tr>\n" .
5948                      "<td colspan=\"5\">$extra</td>\n" .
5949                      "</tr>\n";
5950        }
5951        print "</table>\n";
5952}
5953
5954sub git_heads_body {
5955        # uses global variable $project
5956        my ($headlist, $head_at, $from, $to, $extra) = @_;
5957        $from = 0 unless defined $from;
5958        $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5959
5960        print "<table class=\"heads\">\n";
5961        my $alternate = 1;
5962        for (my $i = $from; $i <= $to; $i++) {
5963                my $entry = $headlist->[$i];
5964                my %ref = %$entry;
5965                my $curr = defined $head_at && $ref{'id'} eq $head_at;
5966                if ($alternate) {
5967                        print "<tr class=\"dark\">\n";
5968                } else {
5969                        print "<tr class=\"light\">\n";
5970                }
5971                $alternate ^= 1;
5972                print "<td><i>$ref{'age'}</i></td>\n" .
5973                      ($curr ? "<td class=\"current_head\">" : "<td>") .
5974                      $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5975                               -class => "list name"},esc_html($ref{'name'})) .
5976                      "</td>\n" .
5977                      "<td class=\"link\">" .
5978                      $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5979                      $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5980                      $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5981                      "</td>\n" .
5982                      "</tr>";
5983        }
5984        if (defined $extra) {
5985                print "<tr>\n" .
5986                      "<td colspan=\"3\">$extra</td>\n" .
5987                      "</tr>\n";
5988        }
5989        print "</table>\n";
5990}
5991
5992# Display a single remote block
5993sub git_remote_block {
5994        my ($remote, $rdata, $limit, $head) = @_;
5995
5996        my $heads = $rdata->{'heads'};
5997        my $fetch = $rdata->{'fetch'};
5998        my $push = $rdata->{'push'};
5999
6000        my $urls_table = "<table class=\"projects_list\">\n" ;
6001
6002        if (defined $fetch) {
6003                if ($fetch eq $push) {
6004                        $urls_table .= format_repo_url("URL", $fetch);
6005                } else {
6006                        $urls_table .= format_repo_url("Fetch URL", $fetch);
6007                        $urls_table .= format_repo_url("Push URL", $push) if defined $push;
6008                }
6009        } elsif (defined $push) {
6010                $urls_table .= format_repo_url("Push URL", $push);
6011        } else {
6012                $urls_table .= format_repo_url("", "No remote URL");
6013        }
6014
6015        $urls_table .= "</table>\n";
6016
6017        my $dots;
6018        if (defined $limit && $limit < @$heads) {
6019                $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
6020        }
6021
6022        print $urls_table;
6023        git_heads_body($heads, $head, 0, $limit, $dots);
6024}
6025
6026# Display a list of remote names with the respective fetch and push URLs
6027sub git_remotes_list {
6028        my ($remotedata, $limit) = @_;
6029        print "<table class=\"heads\">\n";
6030        my $alternate = 1;
6031        my @remotes = sort keys %$remotedata;
6032
6033        my $limited = $limit && $limit < @remotes;
6034
6035        $#remotes = $limit - 1 if $limited;
6036
6037        while (my $remote = shift @remotes) {
6038                my $rdata = $remotedata->{$remote};
6039                my $fetch = $rdata->{'fetch'};
6040                my $push = $rdata->{'push'};
6041                if ($alternate) {
6042                        print "<tr class=\"dark\">\n";
6043                } else {
6044                        print "<tr class=\"light\">\n";
6045                }
6046                $alternate ^= 1;
6047                print "<td>" .
6048                      $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
6049                               -class=> "list name"},esc_html($remote)) .
6050                      "</td>";
6051                print "<td class=\"link\">" .
6052                      (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
6053                      " | " .
6054                      (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
6055                      "</td>";
6056
6057                print "</tr>\n";
6058        }
6059
6060        if ($limited) {
6061                print "<tr>\n" .
6062                      "<td colspan=\"3\">" .
6063                      $cgi->a({-href => href(action=>"remotes")}, "...") .
6064                      "</td>\n" . "</tr>\n";
6065        }
6066
6067        print "</table>";
6068}
6069
6070# Display remote heads grouped by remote, unless there are too many
6071# remotes, in which case we only display the remote names
6072sub git_remotes_body {
6073        my ($remotedata, $limit, $head) = @_;
6074        if ($limit and $limit < keys %$remotedata) {
6075                git_remotes_list($remotedata, $limit);
6076        } else {
6077                fill_remote_heads($remotedata);
6078                while (my ($remote, $rdata) = each %$remotedata) {
6079                        git_print_section({-class=>"remote", -id=>$remote},
6080                                ["remotes", $remote, $remote], sub {
6081                                        git_remote_block($remote, $rdata, $limit, $head);
6082                                });
6083                }
6084        }
6085}
6086
6087sub git_search_message {
6088        my %co = @_;
6089
6090        my $greptype;
6091        if ($searchtype eq 'commit') {
6092                $greptype = "--grep=";
6093        } elsif ($searchtype eq 'author') {
6094                $greptype = "--author=";
6095        } elsif ($searchtype eq 'committer') {
6096                $greptype = "--committer=";
6097        }
6098        $greptype .= $searchtext;
6099        my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6100                                       $greptype, '--regexp-ignore-case',
6101                                       $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6102
6103        my $paging_nav = '';
6104        if ($page > 0) {
6105                $paging_nav .=
6106                        $cgi->a({-href => href(-replay=>1, page=>undef)},
6107                                "first") .
6108                        " &sdot; " .
6109                        $cgi->a({-href => href(-replay=>1, page=>$page-1),
6110                                 -accesskey => "p", -title => "Alt-p"}, "prev");
6111        } else {
6112                $paging_nav .= "first &sdot; prev";
6113        }
6114        my $next_link = '';
6115        if ($#commitlist >= 100) {
6116                $next_link =
6117                        $cgi->a({-href => href(-replay=>1, page=>$page+1),
6118                                 -accesskey => "n", -title => "Alt-n"}, "next");
6119                $paging_nav .= " &sdot; $next_link";
6120        } else {
6121                $paging_nav .= " &sdot; next";
6122        }
6123
6124        git_header_html();
6125
6126        git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6127        git_print_header_div('commit', esc_html($co{'title'}), $hash);
6128        if ($page == 0 && !@commitlist) {
6129                print "<p>No match.</p>\n";
6130        } else {
6131                git_search_grep_body(\@commitlist, 0, 99, $next_link);
6132        }
6133
6134        git_footer_html();
6135}
6136
6137sub git_search_changes {
6138        my %co = @_;
6139
6140        local $/ = "\n";
6141        open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6142                '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6143                ($search_use_regexp ? '--pickaxe-regex' : ())
6144                        or die_error(500, "Open git-log failed");
6145
6146        git_header_html();
6147
6148        git_print_page_nav('','', $hash,$co{'tree'},$hash);
6149        git_print_header_div('commit', esc_html($co{'title'}), $hash);
6150
6151        print "<table class=\"pickaxe search\">\n";
6152        my $alternate = 1;
6153        undef %co;
6154        my @files;
6155        while (my $line = <$fd>) {
6156                chomp $line;
6157                next unless $line;
6158
6159                my %set = parse_difftree_raw_line($line);
6160                if (defined $set{'commit'}) {
6161                        # finish previous commit
6162                        if (%co) {
6163                                print "</td>\n" .
6164                                      "<td class=\"link\">" .
6165                                      $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6166                                              "commit") .
6167                                      " | " .
6168                                      $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6169                                                             hash_base=>$co{'id'})},
6170                                              "tree") .
6171                                      "</td>\n" .
6172                                      "</tr>\n";
6173                        }
6174
6175                        if ($alternate) {
6176                                print "<tr class=\"dark\">\n";
6177                        } else {
6178                                print "<tr class=\"light\">\n";
6179                        }
6180                        $alternate ^= 1;
6181                        %co = parse_commit($set{'commit'});
6182                        my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6183                        print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6184                              "<td><i>$author</i></td>\n" .
6185                              "<td>" .
6186                              $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6187                                      -class => "list subject"},
6188                                      chop_and_escape_str($co{'title'}, 50) . "<br/>");
6189                } elsif (defined $set{'to_id'}) {
6190                        next if ($set{'to_id'} =~ m/^0{40}$/);
6191
6192                        print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6193                                                     hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6194                                      -class => "list"},
6195                                      "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6196                              "<br/>\n";
6197                }
6198        }
6199        close $fd;
6200
6201        # finish last commit (warning: repetition!)
6202        if (%co) {
6203                print "</td>\n" .
6204                      "<td class=\"link\">" .
6205                      $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6206                              "commit") .
6207                      " | " .
6208                      $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6209                                             hash_base=>$co{'id'})},
6210                              "tree") .
6211                      "</td>\n" .
6212                      "</tr>\n";
6213        }
6214
6215        print "</table>\n";
6216
6217        git_footer_html();
6218}
6219
6220sub git_search_files {
6221        my %co = @_;
6222
6223        local $/ = "\n";
6224        open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
6225                $search_use_regexp ? ('-E', '-i') : '-F',
6226                $searchtext, $co{'tree'}
6227                        or die_error(500, "Open git-grep failed");
6228
6229        git_header_html();
6230
6231        git_print_page_nav('','', $hash,$co{'tree'},$hash);
6232        git_print_header_div('commit', esc_html($co{'title'}), $hash);
6233
6234        print "<table class=\"grep_search\">\n";
6235        my $alternate = 1;
6236        my $matches = 0;
6237        my $lastfile = '';
6238        my $file_href;
6239        while (my $line = <$fd>) {
6240                chomp $line;
6241                my ($file, $lno, $ltext, $binary);
6242                last if ($matches++ > 1000);
6243                if ($line =~ /^Binary file (.+) matches$/) {
6244                        $file = $1;
6245                        $binary = 1;
6246                } else {
6247                        ($file, $lno, $ltext) = split(/\0/, $line, 3);
6248                        $file =~ s/^$co{'tree'}://;
6249                }
6250                if ($file ne $lastfile) {
6251                        $lastfile and print "</td></tr>\n";
6252                        if ($alternate++) {
6253                                print "<tr class=\"dark\">\n";
6254                        } else {
6255                                print "<tr class=\"light\">\n";
6256                        }
6257                        $file_href = href(action=>"blob", hash_base=>$co{'id'},
6258                                          file_name=>$file);
6259                        print "<td class=\"list\">".
6260                                $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
6261                        print "</td><td>\n";
6262                        $lastfile = $file;
6263                }
6264                if ($binary) {
6265                        print "<div class=\"binary\">Binary file</div>\n";
6266                } else {
6267                        $ltext = untabify($ltext);
6268                        if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6269                                $ltext = esc_html($1, -nbsp=>1);
6270                                $ltext .= '<span class="match">';
6271                                $ltext .= esc_html($2, -nbsp=>1);
6272                                $ltext .= '</span>';
6273                                $ltext .= esc_html($3, -nbsp=>1);
6274                        } else {
6275                                $ltext = esc_html($ltext, -nbsp=>1);
6276                        }
6277                        print "<div class=\"pre\">" .
6278                                $cgi->a({-href => $file_href.'#l'.$lno,
6279                                        -class => "linenr"}, sprintf('%4i', $lno)) .
6280                                ' ' .  $ltext . "</div>\n";
6281                }
6282        }
6283        if ($lastfile) {
6284                print "</td></tr>\n";
6285                if ($matches > 1000) {
6286                        print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6287                }
6288        } else {
6289                print "<div class=\"diff nodifferences\">No matches found</div>\n";
6290        }
6291        close $fd;
6292
6293        print "</table>\n";
6294
6295        git_footer_html();
6296}
6297
6298sub git_search_grep_body {
6299        my ($commitlist, $from, $to, $extra) = @_;
6300        $from = 0 unless defined $from;
6301        $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6302
6303        print "<table class=\"commit_search\">\n";
6304        my $alternate = 1;
6305        for (my $i = $from; $i <= $to; $i++) {
6306                my %co = %{$commitlist->[$i]};
6307                if (!%co) {
6308                        next;
6309                }
6310                my $commit = $co{'id'};
6311                if ($alternate) {
6312                        print "<tr class=\"dark\">\n";
6313                } else {
6314                        print "<tr class=\"light\">\n";
6315                }
6316                $alternate ^= 1;
6317                print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6318                      format_author_html('td', \%co, 15, 5) .
6319                      "<td>" .
6320                      $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6321                               -class => "list subject"},
6322                              chop_and_escape_str($co{'title'}, 50) . "<br/>");
6323                my $comment = $co{'comment'};
6324                foreach my $line (@$comment) {
6325                        if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6326                                my ($lead, $match, $trail) = ($1, $2, $3);
6327                                $match = chop_str($match, 70, 5, 'center');
6328                                my $contextlen = int((80 - length($match))/2);
6329                                $contextlen = 30 if ($contextlen > 30);
6330                                $lead  = chop_str($lead,  $contextlen, 10, 'left');
6331                                $trail = chop_str($trail, $contextlen, 10, 'right');
6332
6333                                $lead  = esc_html($lead);
6334                                $match = esc_html($match);
6335                                $trail = esc_html($trail);
6336
6337                                print "$lead<span class=\"match\">$match</span>$trail<br />";
6338                        }
6339                }
6340                print "</td>\n" .
6341                      "<td class=\"link\">" .
6342                      $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6343                      " | " .
6344                      $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6345                      " | " .
6346                      $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6347                print "</td>\n" .
6348                      "</tr>\n";
6349        }
6350        if (defined $extra) {
6351                print "<tr>\n" .
6352                      "<td colspan=\"3\">$extra</td>\n" .
6353                      "</tr>\n";
6354        }
6355        print "</table>\n";
6356}
6357
6358## ======================================================================
6359## ======================================================================
6360## actions
6361
6362sub git_project_list {
6363        my $order = $input_params{'order'};
6364        if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6365                die_error(400, "Unknown order parameter");
6366        }
6367
6368        my @list = git_get_projects_list($project_filter, $strict_export);
6369        if (!@list) {
6370                die_error(404, "No projects found");
6371        }
6372
6373        git_header_html();
6374        if (defined $home_text && -f $home_text) {
6375                print "<div class=\"index_include\">\n";
6376                insert_file($home_text);
6377                print "</div>\n";
6378        }
6379
6380        git_project_search_form($searchtext, $search_use_regexp);
6381        git_project_list_body(\@list, $order);
6382        git_footer_html();
6383}
6384
6385sub git_forks {
6386        my $order = $input_params{'order'};
6387        if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6388                die_error(400, "Unknown order parameter");
6389        }
6390
6391        my $filter = $project;
6392        $filter =~ s/\.git$//;
6393        my @list = git_get_projects_list($filter);
6394        if (!@list) {
6395                die_error(404, "No forks found");
6396        }
6397
6398        git_header_html();
6399        git_print_page_nav('','');
6400        git_print_header_div('summary', "$project forks");
6401        git_project_list_body(\@list, $order);
6402        git_footer_html();
6403}
6404
6405sub git_project_index {
6406        my @projects = git_get_projects_list($project_filter, $strict_export);
6407        if (!@projects) {
6408                die_error(404, "No projects found");
6409        }
6410
6411        print $cgi->header(
6412                -type => 'text/plain',
6413                -charset => 'utf-8',
6414                -content_disposition => 'inline; filename="index.aux"');
6415
6416        foreach my $pr (@projects) {
6417                if (!exists $pr->{'owner'}) {
6418                        $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6419                }
6420
6421                my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6422                # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6423                $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6424                $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6425                $path  =~ s/ /\+/g;
6426                $owner =~ s/ /\+/g;
6427
6428                print "$path $owner\n";
6429        }
6430}
6431
6432sub git_summary {
6433        my $descr = git_get_project_description($project) || "none";
6434        my %co = parse_commit("HEAD");
6435        my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6436        my $head = $co{'id'};
6437        my $remote_heads = gitweb_check_feature('remote_heads');
6438
6439        my $owner = git_get_project_owner($project);
6440
6441        my $refs = git_get_references();
6442        # These get_*_list functions return one more to allow us to see if
6443        # there are more ...
6444        my @taglist  = git_get_tags_list(16);
6445        my @headlist = git_get_heads_list(16);
6446        my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6447        my @forklist;
6448        my $check_forks = gitweb_check_feature('forks');
6449
6450        if ($check_forks) {
6451                # find forks of a project
6452                my $filter = $project;
6453                $filter =~ s/\.git$//;
6454                @forklist = git_get_projects_list($filter);
6455                # filter out forks of forks
6456                @forklist = filter_forks_from_projects_list(\@forklist)
6457                        if (@forklist);
6458        }
6459
6460        git_header_html();
6461        git_print_page_nav('summary','', $head);
6462
6463        print "<div class=\"title\">&nbsp;</div>\n";
6464        print "<table class=\"projects_list\">\n" .
6465              "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n";
6466        unless ($omit_owner) {
6467                print  "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6468        }
6469        if (defined $cd{'rfc2822'}) {
6470                print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6471                      "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6472        }
6473
6474        # use per project git URL list in $projectroot/$project/cloneurl
6475        # or make project git URL from git base URL and project name
6476        my $url_tag = "URL";
6477        my @url_list = git_get_project_url_list($project);
6478        @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6479        foreach my $git_url (@url_list) {
6480                next unless $git_url;
6481                print format_repo_url($url_tag, $git_url);
6482                $url_tag = "";
6483        }
6484
6485        # Tag cloud
6486        my $show_ctags = gitweb_check_feature('ctags');
6487        if ($show_ctags) {
6488                my $ctags = git_get_project_ctags($project);
6489                if (%$ctags) {
6490                        # without ability to add tags, don't show if there are none
6491                        my $cloud = git_populate_project_tagcloud($ctags);
6492                        print "<tr id=\"metadata_ctags\">" .
6493                              "<td>content tags</td>" .
6494                              "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6495                              "</tr>\n";
6496                }
6497        }
6498
6499        print "</table>\n";
6500
6501        # If XSS prevention is on, we don't include README.html.
6502        # TODO: Allow a readme in some safe format.
6503        if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6504                print "<div class=\"title\">readme</div>\n" .
6505                      "<div class=\"readme\">\n";
6506                insert_file("$projectroot/$project/README.html");
6507                print "\n</div>\n"; # class="readme"
6508        }
6509
6510        # we need to request one more than 16 (0..15) to check if
6511        # those 16 are all
6512        my @commitlist = $head ? parse_commits($head, 17) : ();
6513        if (@commitlist) {
6514                git_print_header_div('shortlog');
6515                git_shortlog_body(\@commitlist, 0, 15, $refs,
6516                                  $#commitlist <=  15 ? undef :
6517                                  $cgi->a({-href => href(action=>"shortlog")}, "..."));
6518        }
6519
6520        if (@taglist) {
6521                git_print_header_div('tags');
6522                git_tags_body(\@taglist, 0, 15,
6523                              $#taglist <=  15 ? undef :
6524                              $cgi->a({-href => href(action=>"tags")}, "..."));
6525        }
6526
6527        if (@headlist) {
6528                git_print_header_div('heads');
6529                git_heads_body(\@headlist, $head, 0, 15,
6530                               $#headlist <= 15 ? undef :
6531                               $cgi->a({-href => href(action=>"heads")}, "..."));
6532        }
6533
6534        if (%remotedata) {
6535                git_print_header_div('remotes');
6536                git_remotes_body(\%remotedata, 15, $head);
6537        }
6538
6539        if (@forklist) {
6540                git_print_header_div('forks');
6541                git_project_list_body(\@forklist, 'age', 0, 15,
6542                                      $#forklist <= 15 ? undef :
6543                                      $cgi->a({-href => href(action=>"forks")}, "..."),
6544                                      'no_header');
6545        }
6546
6547        git_footer_html();
6548}
6549
6550sub git_tag {
6551        my %tag = parse_tag($hash);
6552
6553        if (! %tag) {
6554                die_error(404, "Unknown tag object");
6555        }
6556
6557        my $head = git_get_head_hash($project);
6558        git_header_html();
6559        git_print_page_nav('','', $head,undef,$head);
6560        git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6561        print "<div class=\"title_text\">\n" .
6562              "<table class=\"object_header\">\n" .
6563              "<tr>\n" .
6564              "<td>object</td>\n" .
6565              "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6566                               $tag{'object'}) . "</td>\n" .
6567              "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6568                                              $tag{'type'}) . "</td>\n" .
6569              "</tr>\n";
6570        if (defined($tag{'author'})) {
6571                git_print_authorship_rows(\%tag, 'author');
6572        }
6573        print "</table>\n\n" .
6574              "</div>\n";
6575        print "<div class=\"page_body\">";
6576        my $comment = $tag{'comment'};
6577        foreach my $line (@$comment) {
6578                chomp $line;
6579                print esc_html($line, -nbsp=>1) . "<br/>\n";
6580        }
6581        print "</div>\n";
6582        git_footer_html();
6583}
6584
6585sub git_blame_common {
6586        my $format = shift || 'porcelain';
6587        if ($format eq 'porcelain' && $input_params{'javascript'}) {
6588                $format = 'incremental';
6589                $action = 'blame_incremental'; # for page title etc
6590        }
6591
6592        # permissions
6593        gitweb_check_feature('blame')
6594                or die_error(403, "Blame view not allowed");
6595
6596        # error checking
6597        die_error(400, "No file name given") unless $file_name;
6598        $hash_base ||= git_get_head_hash($project);
6599        die_error(404, "Couldn't find base commit") unless $hash_base;
6600        my %co = parse_commit($hash_base)
6601                or die_error(404, "Commit not found");
6602        my $ftype = "blob";
6603        if (!defined $hash) {
6604                $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6605                        or die_error(404, "Error looking up file");
6606        } else {
6607                $ftype = git_get_type($hash);
6608                if ($ftype !~ "blob") {
6609                        die_error(400, "Object is not a blob");
6610                }
6611        }
6612
6613        my $fd;
6614        if ($format eq 'incremental') {
6615                # get file contents (as base)
6616                open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6617                        or die_error(500, "Open git-cat-file failed");
6618        } elsif ($format eq 'data') {
6619                # run git-blame --incremental
6620                open $fd, "-|", git_cmd(), "blame", "--incremental",
6621                        $hash_base, "--", $file_name
6622                        or die_error(500, "Open git-blame --incremental failed");
6623        } else {
6624                # run git-blame --porcelain
6625                open $fd, "-|", git_cmd(), "blame", '-p',
6626                        $hash_base, '--', $file_name
6627                        or die_error(500, "Open git-blame --porcelain failed");
6628        }
6629
6630        # incremental blame data returns early
6631        if ($format eq 'data') {
6632                print $cgi->header(
6633                        -type=>"text/plain", -charset => "utf-8",
6634                        -status=> "200 OK");
6635                local $| = 1; # output autoflush
6636                while (my $line = <$fd>) {
6637                        print to_utf8($line);
6638                }
6639                close $fd
6640                        or print "ERROR $!\n";
6641
6642                print 'END';
6643                if (defined $t0 && gitweb_check_feature('timed')) {
6644                        print ' '.
6645                              tv_interval($t0, [ gettimeofday() ]).
6646                              ' '.$number_of_git_cmds;
6647                }
6648                print "\n";
6649
6650                return;
6651        }
6652
6653        # page header
6654        git_header_html();
6655        my $formats_nav =
6656                $cgi->a({-href => href(action=>"blob", -replay=>1)},
6657                        "blob") .
6658                " | ";
6659        if ($format eq 'incremental') {
6660                $formats_nav .=
6661                        $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6662                                "blame") . " (non-incremental)";
6663        } else {
6664                $formats_nav .=
6665                        $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6666                                "blame") . " (incremental)";
6667        }
6668        $formats_nav .=
6669                " | " .
6670                $cgi->a({-href => href(action=>"history", -replay=>1)},
6671                        "history") .
6672                " | " .
6673                $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6674                        "HEAD");
6675        git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6676        git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6677        git_print_page_path($file_name, $ftype, $hash_base);
6678
6679        # page body
6680        if ($format eq 'incremental') {
6681                print "<noscript>\n<div class=\"error\"><center><b>\n".
6682                      "This page requires JavaScript to run.\n Use ".
6683                      $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6684                              'this page').
6685                      " instead.\n".
6686                      "</b></center></div>\n</noscript>\n";
6687
6688                print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6689        }
6690
6691        print qq!<div class="page_body">\n!;
6692        print qq!<div id="progress_info">... / ...</div>\n!
6693                if ($format eq 'incremental');
6694        print qq!<table id="blame_table" class="blame" width="100%">\n!.
6695              #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6696              qq!<thead>\n!.
6697              qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6698              qq!</thead>\n!.
6699              qq!<tbody>\n!;
6700
6701        my @rev_color = qw(light dark);
6702        my $num_colors = scalar(@rev_color);
6703        my $current_color = 0;
6704
6705        if ($format eq 'incremental') {
6706                my $color_class = $rev_color[$current_color];
6707
6708                #contents of a file
6709                my $linenr = 0;
6710        LINE:
6711                while (my $line = <$fd>) {
6712                        chomp $line;
6713                        $linenr++;
6714
6715                        print qq!<tr id="l$linenr" class="$color_class">!.
6716                              qq!<td class="sha1"><a href=""> </a></td>!.
6717                              qq!<td class="linenr">!.
6718                              qq!<a class="linenr" href="">$linenr</a></td>!;
6719                        print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6720                        print qq!</tr>\n!;
6721                }
6722
6723        } else { # porcelain, i.e. ordinary blame
6724                my %metainfo = (); # saves information about commits
6725
6726                # blame data
6727        LINE:
6728                while (my $line = <$fd>) {
6729                        chomp $line;
6730                        # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6731                        # no <lines in group> for subsequent lines in group of lines
6732                        my ($full_rev, $orig_lineno, $lineno, $group_size) =
6733                           ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6734                        if (!exists $metainfo{$full_rev}) {
6735                                $metainfo{$full_rev} = { 'nprevious' => 0 };
6736                        }
6737                        my $meta = $metainfo{$full_rev};
6738                        my $data;
6739                        while ($data = <$fd>) {
6740                                chomp $data;
6741                                last if ($data =~ s/^\t//); # contents of line
6742                                if ($data =~ /^(\S+)(?: (.*))?$/) {
6743                                        $meta->{$1} = $2 unless exists $meta->{$1};
6744                                }
6745                                if ($data =~ /^previous /) {
6746                                        $meta->{'nprevious'}++;
6747                                }
6748                        }
6749                        my $short_rev = substr($full_rev, 0, 8);
6750                        my $author = $meta->{'author'};
6751                        my %date =
6752                                parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6753                        my $date = $date{'iso-tz'};
6754                        if ($group_size) {
6755                                $current_color = ($current_color + 1) % $num_colors;
6756                        }
6757                        my $tr_class = $rev_color[$current_color];
6758                        $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6759                        $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6760                        $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6761                        print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6762                        if ($group_size) {
6763                                print "<td class=\"sha1\"";
6764                                print " title=\"". esc_html($author) . ", $date\"";
6765                                print " rowspan=\"$group_size\"" if ($group_size > 1);
6766                                print ">";
6767                                print $cgi->a({-href => href(action=>"commit",
6768                                                             hash=>$full_rev,
6769                                                             file_name=>$file_name)},
6770                                              esc_html($short_rev));
6771                                if ($group_size >= 2) {
6772                                        my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6773                                        if (@author_initials) {
6774                                                print "<br />" .
6775                                                      esc_html(join('', @author_initials));
6776                                                #           or join('.', ...)
6777                                        }
6778                                }
6779                                print "</td>\n";
6780                        }
6781                        # 'previous' <sha1 of parent commit> <filename at commit>
6782                        if (exists $meta->{'previous'} &&
6783                            $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6784                                $meta->{'parent'} = $1;
6785                                $meta->{'file_parent'} = unquote($2);
6786                        }
6787                        my $linenr_commit =
6788                                exists($meta->{'parent'}) ?
6789                                $meta->{'parent'} : $full_rev;
6790                        my $linenr_filename =
6791                                exists($meta->{'file_parent'}) ?
6792                                $meta->{'file_parent'} : unquote($meta->{'filename'});
6793                        my $blamed = href(action => 'blame',
6794                                          file_name => $linenr_filename,
6795                                          hash_base => $linenr_commit);
6796                        print "<td class=\"linenr\">";
6797                        print $cgi->a({ -href => "$blamed#l$orig_lineno",
6798                                        -class => "linenr" },
6799                                      esc_html($lineno));
6800                        print "</td>";
6801                        print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6802                        print "</tr>\n";
6803                } # end while
6804
6805        }
6806
6807        # footer
6808        print "</tbody>\n".
6809              "</table>\n"; # class="blame"
6810        print "</div>\n";   # class="blame_body"
6811        close $fd
6812                or print "Reading blob failed\n";
6813
6814        git_footer_html();
6815}
6816
6817sub git_blame {
6818        git_blame_common();
6819}
6820
6821sub git_blame_incremental {
6822        git_blame_common('incremental');
6823}
6824
6825sub git_blame_data {
6826        git_blame_common('data');
6827}
6828
6829sub git_tags {
6830        my $head = git_get_head_hash($project);
6831        git_header_html();
6832        git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6833        git_print_header_div('summary', $project);
6834
6835        my @tagslist = git_get_tags_list();
6836        if (@tagslist) {
6837                git_tags_body(\@tagslist);
6838        }
6839        git_footer_html();
6840}
6841
6842sub git_heads {
6843        my $head = git_get_head_hash($project);
6844        git_header_html();
6845        git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6846        git_print_header_div('summary', $project);
6847
6848        my @headslist = git_get_heads_list();
6849        if (@headslist) {
6850                git_heads_body(\@headslist, $head);
6851        }
6852        git_footer_html();
6853}
6854
6855# used both for single remote view and for list of all the remotes
6856sub git_remotes {
6857        gitweb_check_feature('remote_heads')
6858                or die_error(403, "Remote heads view is disabled");
6859
6860        my $head = git_get_head_hash($project);
6861        my $remote = $input_params{'hash'};
6862
6863        my $remotedata = git_get_remotes_list($remote);
6864        die_error(500, "Unable to get remote information") unless defined $remotedata;
6865
6866        unless (%$remotedata) {
6867                die_error(404, defined $remote ?
6868                        "Remote $remote not found" :
6869                        "No remotes found");
6870        }
6871
6872        git_header_html(undef, undef, -action_extra => $remote);
6873        git_print_page_nav('', '',  $head, undef, $head,
6874                format_ref_views($remote ? '' : 'remotes'));
6875
6876        fill_remote_heads($remotedata);
6877        if (defined $remote) {
6878                git_print_header_div('remotes', "$remote remote for $project");
6879                git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6880        } else {
6881                git_print_header_div('summary', "$project remotes");
6882                git_remotes_body($remotedata, undef, $head);
6883        }
6884
6885        git_footer_html();
6886}
6887
6888sub git_blob_plain {
6889        my $type = shift;
6890        my $expires;
6891
6892        if (!defined $hash) {
6893                if (defined $file_name) {
6894                        my $base = $hash_base || git_get_head_hash($project);
6895                        $hash = git_get_hash_by_path($base, $file_name, "blob")
6896                                or die_error(404, "Cannot find file");
6897                } else {
6898                        die_error(400, "No file name defined");
6899                }
6900        } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6901                # blobs defined by non-textual hash id's can be cached
6902                $expires = "+1d";
6903        }
6904
6905        open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6906                or die_error(500, "Open git-cat-file blob '$hash' failed");
6907
6908        # content-type (can include charset)
6909        $type = blob_contenttype($fd, $file_name, $type);
6910
6911        # "save as" filename, even when no $file_name is given
6912        my $save_as = "$hash";
6913        if (defined $file_name) {
6914                $save_as = $file_name;
6915        } elsif ($type =~ m/^text\//) {
6916                $save_as .= '.txt';
6917        }
6918
6919        # With XSS prevention on, blobs of all types except a few known safe
6920        # ones are served with "Content-Disposition: attachment" to make sure
6921        # they don't run in our security domain.  For certain image types,
6922        # blob view writes an <img> tag referring to blob_plain view, and we
6923        # want to be sure not to break that by serving the image as an
6924        # attachment (though Firefox 3 doesn't seem to care).
6925        my $sandbox = $prevent_xss &&
6926                $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6927
6928        # serve text/* as text/plain
6929        if ($prevent_xss &&
6930            ($type =~ m!^text/[a-z]+\b(.*)$! ||
6931             ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6932                my $rest = $1;
6933                $rest = defined $rest ? $rest : '';
6934                $type = "text/plain$rest";
6935        }
6936
6937        print $cgi->header(
6938                -type => $type,
6939                -expires => $expires,
6940                -content_disposition =>
6941                        ($sandbox ? 'attachment' : 'inline')
6942                        . '; filename="' . $save_as . '"');
6943        local $/ = undef;
6944        binmode STDOUT, ':raw';
6945        print <$fd>;
6946        binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6947        close $fd;
6948}
6949
6950sub git_blob {
6951        my $expires;
6952
6953        if (!defined $hash) {
6954                if (defined $file_name) {
6955                        my $base = $hash_base || git_get_head_hash($project);
6956                        $hash = git_get_hash_by_path($base, $file_name, "blob")
6957                                or die_error(404, "Cannot find file");
6958                } else {
6959                        die_error(400, "No file name defined");
6960                }
6961        } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6962                # blobs defined by non-textual hash id's can be cached
6963                $expires = "+1d";
6964        }
6965
6966        my $have_blame = gitweb_check_feature('blame');
6967        open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6968                or die_error(500, "Couldn't cat $file_name, $hash");
6969        my $mimetype = blob_mimetype($fd, $file_name);
6970        # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6971        if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6972                close $fd;
6973                return git_blob_plain($mimetype);
6974        }
6975        # we can have blame only for text/* mimetype
6976        $have_blame &&= ($mimetype =~ m!^text/!);
6977
6978        my $highlight = gitweb_check_feature('highlight');
6979        my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6980        $fd = run_highlighter($fd, $highlight, $syntax)
6981                if $syntax;
6982
6983        git_header_html(undef, $expires);
6984        my $formats_nav = '';
6985        if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6986                if (defined $file_name) {
6987                        if ($have_blame) {
6988                                $formats_nav .=
6989                                        $cgi->a({-href => href(action=>"blame", -replay=>1)},
6990                                                "blame") .
6991                                        " | ";
6992                        }
6993                        $formats_nav .=
6994                                $cgi->a({-href => href(action=>"history", -replay=>1)},
6995                                        "history") .
6996                                " | " .
6997                                $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6998                                        "raw") .
6999                                " | " .
7000                                $cgi->a({-href => href(action=>"blob",
7001                                                       hash_base=>"HEAD", file_name=>$file_name)},
7002                                        "HEAD");
7003                } else {
7004                        $formats_nav .=
7005                                $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7006                                        "raw");
7007                }
7008                git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7009                git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7010        } else {
7011                print "<div class=\"page_nav\">\n" .
7012                      "<br/><br/></div>\n" .
7013                      "<div class=\"title\">".esc_html($hash)."</div>\n";
7014        }
7015        git_print_page_path($file_name, "blob", $hash_base);
7016        print "<div class=\"page_body\">\n";
7017        if ($mimetype =~ m!^image/!) {
7018                print qq!<img type="!.esc_attr($mimetype).qq!"!;
7019                if ($file_name) {
7020                        print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
7021                }
7022                print qq! src="! .
7023                      href(action=>"blob_plain", hash=>$hash,
7024                           hash_base=>$hash_base, file_name=>$file_name) .
7025                      qq!" />\n!;
7026        } else {
7027                my $nr;
7028                while (my $line = <$fd>) {
7029                        chomp $line;
7030                        $nr++;
7031                        $line = untabify($line);
7032                        printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
7033                               $nr, esc_attr(href(-replay => 1)), $nr, $nr,
7034                               $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
7035                }
7036        }
7037        close $fd
7038                or print "Reading blob failed.\n";
7039        print "</div>";
7040        git_footer_html();
7041}
7042
7043sub git_tree {
7044        if (!defined $hash_base) {
7045                $hash_base = "HEAD";
7046        }
7047        if (!defined $hash) {
7048                if (defined $file_name) {
7049                        $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
7050                } else {
7051                        $hash = $hash_base;
7052                }
7053        }
7054        die_error(404, "No such tree") unless defined($hash);
7055
7056        my $show_sizes = gitweb_check_feature('show-sizes');
7057        my $have_blame = gitweb_check_feature('blame');
7058
7059        my @entries = ();
7060        {
7061                local $/ = "\0";
7062                open my $fd, "-|", git_cmd(), "ls-tree", '-z',
7063                        ($show_sizes ? '-l' : ()), @extra_options, $hash
7064                        or die_error(500, "Open git-ls-tree failed");
7065                @entries = map { chomp; $_ } <$fd>;
7066                close $fd
7067                        or die_error(404, "Reading tree failed");
7068        }
7069
7070        my $refs = git_get_references();
7071        my $ref = format_ref_marker($refs, $hash_base);
7072        git_header_html();
7073        my $basedir = '';
7074        if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7075                my @views_nav = ();
7076                if (defined $file_name) {
7077                        push @views_nav,
7078                                $cgi->a({-href => href(action=>"history", -replay=>1)},
7079                                        "history"),
7080                                $cgi->a({-href => href(action=>"tree",
7081                                                       hash_base=>"HEAD", file_name=>$file_name)},
7082                                        "HEAD"),
7083                }
7084                my $snapshot_links = format_snapshot_links($hash);
7085                if (defined $snapshot_links) {
7086                        # FIXME: Should be available when we have no hash base as well.
7087                        push @views_nav, $snapshot_links;
7088                }
7089                git_print_page_nav('tree','', $hash_base, undef, undef,
7090                                   join(' | ', @views_nav));
7091                git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
7092        } else {
7093                undef $hash_base;
7094                print "<div class=\"page_nav\">\n";
7095                print "<br/><br/></div>\n";
7096                print "<div class=\"title\">".esc_html($hash)."</div>\n";
7097        }
7098        if (defined $file_name) {
7099                $basedir = $file_name;
7100                if ($basedir ne '' && substr($basedir, -1) ne '/') {
7101                        $basedir .= '/';
7102                }
7103                git_print_page_path($file_name, 'tree', $hash_base);
7104        }
7105        print "<div class=\"page_body\">\n";
7106        print "<table class=\"tree\">\n";
7107        my $alternate = 1;
7108        # '..' (top directory) link if possible
7109        if (defined $hash_base &&
7110            defined $file_name && $file_name =~ m![^/]+$!) {
7111                if ($alternate) {
7112                        print "<tr class=\"dark\">\n";
7113                } else {
7114                        print "<tr class=\"light\">\n";
7115                }
7116                $alternate ^= 1;
7117
7118                my $up = $file_name;
7119                $up =~ s!/?[^/]+$!!;
7120                undef $up unless $up;
7121                # based on git_print_tree_entry
7122                print '<td class="mode">' . mode_str('040000') . "</td>\n";
7123                print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
7124                print '<td class="list">';
7125                print $cgi->a({-href => href(action=>"tree",
7126                                             hash_base=>$hash_base,
7127                                             file_name=>$up)},
7128                              "..");
7129                print "</td>\n";
7130                print "<td class=\"link\"></td>\n";
7131
7132                print "</tr>\n";
7133        }
7134        foreach my $line (@entries) {
7135                my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
7136
7137                if ($alternate) {
7138                        print "<tr class=\"dark\">\n";
7139                } else {
7140                        print "<tr class=\"light\">\n";
7141                }
7142                $alternate ^= 1;
7143
7144                git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
7145
7146                print "</tr>\n";
7147        }
7148        print "</table>\n" .
7149              "</div>";
7150        git_footer_html();
7151}
7152
7153sub snapshot_name {
7154        my ($project, $hash) = @_;
7155
7156        # path/to/project.git  -> project
7157        # path/to/project/.git -> project
7158        my $name = to_utf8($project);
7159        $name =~ s,([^/])/*\.git$,$1,;
7160        $name = basename($name);
7161        # sanitize name
7162        $name =~ s/[[:cntrl:]]/?/g;
7163
7164        my $ver = $hash;
7165        if ($hash =~ /^[0-9a-fA-F]+$/) {
7166                # shorten SHA-1 hash
7167                my $full_hash = git_get_full_hash($project, $hash);
7168                if ($full_hash =~ /^$hash/ && length($hash) > 7) {
7169                        $ver = git_get_short_hash($project, $hash);
7170                }
7171        } elsif ($hash =~ m!^refs/tags/(.*)$!) {
7172                # tags don't need shortened SHA-1 hash
7173                $ver = $1;
7174        } else {
7175                # branches and other need shortened SHA-1 hash
7176                if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
7177                        $ver = $1;
7178                }
7179                $ver .= '-' . git_get_short_hash($project, $hash);
7180        }
7181        # in case of hierarchical branch names
7182        $ver =~ s!/!.!g;
7183
7184        # name = project-version_string
7185        $name = "$name-$ver";
7186
7187        return wantarray ? ($name, $name) : $name;
7188}
7189
7190sub exit_if_unmodified_since {
7191        my ($latest_epoch) = @_;
7192        our $cgi;
7193
7194        my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7195        if (defined $if_modified) {
7196                my $since;
7197                if (eval { require HTTP::Date; 1; }) {
7198                        $since = HTTP::Date::str2time($if_modified);
7199                } elsif (eval { require Time::ParseDate; 1; }) {
7200                        $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7201                }
7202                if (defined $since && $latest_epoch <= $since) {
7203                        my %latest_date = parse_date($latest_epoch);
7204                        print $cgi->header(
7205                                -last_modified => $latest_date{'rfc2822'},
7206                                -status => '304 Not Modified');
7207                        goto DONE_GITWEB;
7208                }
7209        }
7210}
7211
7212sub git_snapshot {
7213        my $format = $input_params{'snapshot_format'};
7214        if (!@snapshot_fmts) {
7215                die_error(403, "Snapshots not allowed");
7216        }
7217        # default to first supported snapshot format
7218        $format ||= $snapshot_fmts[0];
7219        if ($format !~ m/^[a-z0-9]+$/) {
7220                die_error(400, "Invalid snapshot format parameter");
7221        } elsif (!exists($known_snapshot_formats{$format})) {
7222                die_error(400, "Unknown snapshot format");
7223        } elsif ($known_snapshot_formats{$format}{'disabled'}) {
7224                die_error(403, "Snapshot format not allowed");
7225        } elsif (!grep($_ eq $format, @snapshot_fmts)) {
7226                die_error(403, "Unsupported snapshot format");
7227        }
7228
7229        my $type = git_get_type("$hash^{}");
7230        if (!$type) {
7231                die_error(404, 'Object does not exist');
7232        }  elsif ($type eq 'blob') {
7233                die_error(400, 'Object is not a tree-ish');
7234        }
7235
7236        my ($name, $prefix) = snapshot_name($project, $hash);
7237        my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
7238
7239        my %co = parse_commit($hash);
7240        exit_if_unmodified_since($co{'committer_epoch'}) if %co;
7241
7242        my $cmd = quote_command(
7243                git_cmd(), 'archive',
7244                "--format=$known_snapshot_formats{$format}{'format'}",
7245                "--prefix=$prefix/", $hash);
7246        if (exists $known_snapshot_formats{$format}{'compressor'}) {
7247                $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
7248        }
7249
7250        $filename =~ s/(["\\])/\\$1/g;
7251        my %latest_date;
7252        if (%co) {
7253                %latest_date = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
7254        }
7255
7256        print $cgi->header(
7257                -type => $known_snapshot_formats{$format}{'type'},
7258                -content_disposition => 'inline; filename="' . $filename . '"',
7259                %co ? (-last_modified => $latest_date{'rfc2822'}) : (),
7260                -status => '200 OK');
7261
7262        open my $fd, "-|", $cmd
7263                or die_error(500, "Execute git-archive failed");
7264        binmode STDOUT, ':raw';
7265        print <$fd>;
7266        binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7267        close $fd;
7268}
7269
7270sub git_log_generic {
7271        my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
7272
7273        my $head = git_get_head_hash($project);
7274        if (!defined $base) {
7275                $base = $head;
7276        }
7277        if (!defined $page) {
7278                $page = 0;
7279        }
7280        my $refs = git_get_references();
7281
7282        my $commit_hash = $base;
7283        if (defined $parent) {
7284                $commit_hash = "$parent..$base";
7285        }
7286        my @commitlist =
7287                parse_commits($commit_hash, 101, (100 * $page),
7288                              defined $file_name ? ($file_name, "--full-history") : ());
7289
7290        my $ftype;
7291        if (!defined $file_hash && defined $file_name) {
7292                # some commits could have deleted file in question,
7293                # and not have it in tree, but one of them has to have it
7294                for (my $i = 0; $i < @commitlist; $i++) {
7295                        $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
7296                        last if defined $file_hash;
7297                }
7298        }
7299        if (defined $file_hash) {
7300                $ftype = git_get_type($file_hash);
7301        }
7302        if (defined $file_name && !defined $ftype) {
7303                die_error(500, "Unknown type of object");
7304        }
7305        my %co;
7306        if (defined $file_name) {
7307                %co = parse_commit($base)
7308                        or die_error(404, "Unknown commit object");
7309        }
7310
7311
7312        my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
7313        my $next_link = '';
7314        if ($#commitlist >= 100) {
7315                $next_link =
7316                        $cgi->a({-href => href(-replay=>1, page=>$page+1),
7317                                 -accesskey => "n", -title => "Alt-n"}, "next");
7318        }
7319        my $patch_max = gitweb_get_feature('patches');
7320        if ($patch_max && !defined $file_name) {
7321                if ($patch_max < 0 || @commitlist <= $patch_max) {
7322                        $paging_nav .= " &sdot; " .
7323                                $cgi->a({-href => href(action=>"patches", -replay=>1)},
7324                                        "patches");
7325                }
7326        }
7327
7328        git_header_html();
7329        git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7330        if (defined $file_name) {
7331                git_print_header_div('commit', esc_html($co{'title'}), $base);
7332        } else {
7333                git_print_header_div('summary', $project)
7334        }
7335        git_print_page_path($file_name, $ftype, $hash_base)
7336                if (defined $file_name);
7337
7338        $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7339                     $file_name, $file_hash, $ftype);
7340
7341        git_footer_html();
7342}
7343
7344sub git_log {
7345        git_log_generic('log', \&git_log_body,
7346                        $hash, $hash_parent);
7347}
7348
7349sub git_commit {
7350        $hash ||= $hash_base || "HEAD";
7351        my %co = parse_commit($hash)
7352            or die_error(404, "Unknown commit object");
7353
7354        my $parent  = $co{'parent'};
7355        my $parents = $co{'parents'}; # listref
7356
7357        # we need to prepare $formats_nav before any parameter munging
7358        my $formats_nav;
7359        if (!defined $parent) {
7360                # --root commitdiff
7361                $formats_nav .= '(initial)';
7362        } elsif (@$parents == 1) {
7363                # single parent commit
7364                $formats_nav .=
7365                        '(parent: ' .
7366                        $cgi->a({-href => href(action=>"commit",
7367                                               hash=>$parent)},
7368                                esc_html(substr($parent, 0, 7))) .
7369                        ')';
7370        } else {
7371                # merge commit
7372                $formats_nav .=
7373                        '(merge: ' .
7374                        join(' ', map {
7375                                $cgi->a({-href => href(action=>"commit",
7376                                                       hash=>$_)},
7377                                        esc_html(substr($_, 0, 7)));
7378                        } @$parents ) .
7379                        ')';
7380        }
7381        if (gitweb_check_feature('patches') && @$parents <= 1) {
7382                $formats_nav .= " | " .
7383                        $cgi->a({-href => href(action=>"patch", -replay=>1)},
7384                                "patch");
7385        }
7386
7387        if (!defined $parent) {
7388                $parent = "--root";
7389        }
7390        my @difftree;
7391        open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7392                @diff_opts,
7393                (@$parents <= 1 ? $parent : '-c'),
7394                $hash, "--"
7395                or die_error(500, "Open git-diff-tree failed");
7396        @difftree = map { chomp; $_ } <$fd>;
7397        close $fd or die_error(404, "Reading git-diff-tree failed");
7398
7399        # non-textual hash id's can be cached
7400        my $expires;
7401        if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7402                $expires = "+1d";
7403        }
7404        my $refs = git_get_references();
7405        my $ref = format_ref_marker($refs, $co{'id'});
7406
7407        git_header_html(undef, $expires);
7408        git_print_page_nav('commit', '',
7409                           $hash, $co{'tree'}, $hash,
7410                           $formats_nav);
7411
7412        if (defined $co{'parent'}) {
7413                git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7414        } else {
7415                git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7416        }
7417        print "<div class=\"title_text\">\n" .
7418              "<table class=\"object_header\">\n";
7419        git_print_authorship_rows(\%co);
7420        print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7421        print "<tr>" .
7422              "<td>tree</td>" .
7423              "<td class=\"sha1\">" .
7424              $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7425                       class => "list"}, $co{'tree'}) .
7426              "</td>" .
7427              "<td class=\"link\">" .
7428              $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7429                      "tree");
7430        my $snapshot_links = format_snapshot_links($hash);
7431        if (defined $snapshot_links) {
7432                print " | " . $snapshot_links;
7433        }
7434        print "</td>" .
7435              "</tr>\n";
7436
7437        foreach my $par (@$parents) {
7438                print "<tr>" .
7439                      "<td>parent</td>" .
7440                      "<td class=\"sha1\">" .
7441                      $cgi->a({-href => href(action=>"commit", hash=>$par),
7442                               class => "list"}, $par) .
7443                      "</td>" .
7444                      "<td class=\"link\">" .
7445                      $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7446                      " | " .
7447                      $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7448                      "</td>" .
7449                      "</tr>\n";
7450        }
7451        print "</table>".
7452              "</div>\n";
7453
7454        print "<div class=\"page_body\">\n";
7455        git_print_log($co{'comment'});
7456        print "</div>\n";
7457
7458        git_difftree_body(\@difftree, $hash, @$parents);
7459
7460        git_footer_html();
7461}
7462
7463sub git_object {
7464        # object is defined by:
7465        # - hash or hash_base alone
7466        # - hash_base and file_name
7467        my $type;
7468
7469        # - hash or hash_base alone
7470        if ($hash || ($hash_base && !defined $file_name)) {
7471                my $object_id = $hash || $hash_base;
7472
7473                open my $fd, "-|", quote_command(
7474                        git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7475                        or die_error(404, "Object does not exist");
7476                $type = <$fd>;
7477                chomp $type;
7478                close $fd
7479                        or die_error(404, "Object does not exist");
7480
7481        # - hash_base and file_name
7482        } elsif ($hash_base && defined $file_name) {
7483                $file_name =~ s,/+$,,;
7484
7485                system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7486                        or die_error(404, "Base object does not exist");
7487
7488                # here errors should not happen
7489                open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7490                        or die_error(500, "Open git-ls-tree failed");
7491                my $line = <$fd>;
7492                close $fd;
7493
7494                #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7495                unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7496                        die_error(404, "File or directory for given base does not exist");
7497                }
7498                $type = $2;
7499                $hash = $3;
7500        } else {
7501                die_error(400, "Not enough information to find object");
7502        }
7503
7504        print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7505                                          hash=>$hash, hash_base=>$hash_base,
7506                                          file_name=>$file_name),
7507                             -status => '302 Found');
7508}
7509
7510sub git_blobdiff {
7511        my $format = shift || 'html';
7512        my $diff_style = $input_params{'diff_style'} || 'inline';
7513
7514        my $fd;
7515        my @difftree;
7516        my %diffinfo;
7517        my $expires;
7518
7519        # preparing $fd and %diffinfo for git_patchset_body
7520        # new style URI
7521        if (defined $hash_base && defined $hash_parent_base) {
7522                if (defined $file_name) {
7523                        # read raw output
7524                        open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7525                                $hash_parent_base, $hash_base,
7526                                "--", (defined $file_parent ? $file_parent : ()), $file_name
7527                                or die_error(500, "Open git-diff-tree failed");
7528                        @difftree = map { chomp; $_ } <$fd>;
7529                        close $fd
7530                                or die_error(404, "Reading git-diff-tree failed");
7531                        @difftree
7532                                or die_error(404, "Blob diff not found");
7533
7534                } elsif (defined $hash &&
7535                         $hash =~ /[0-9a-fA-F]{40}/) {
7536                        # try to find filename from $hash
7537
7538                        # read filtered raw output
7539                        open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7540                                $hash_parent_base, $hash_base, "--"
7541                                or die_error(500, "Open git-diff-tree failed");
7542                        @difftree =
7543                                # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7544                                # $hash == to_id
7545                                grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7546                                map { chomp; $_ } <$fd>;
7547                        close $fd
7548                                or die_error(404, "Reading git-diff-tree failed");
7549                        @difftree
7550                                or die_error(404, "Blob diff not found");
7551
7552                } else {
7553                        die_error(400, "Missing one of the blob diff parameters");
7554                }
7555
7556                if (@difftree > 1) {
7557                        die_error(400, "Ambiguous blob diff specification");
7558                }
7559
7560                %diffinfo = parse_difftree_raw_line($difftree[0]);
7561                $file_parent ||= $diffinfo{'from_file'} || $file_name;
7562                $file_name   ||= $diffinfo{'to_file'};
7563
7564                $hash_parent ||= $diffinfo{'from_id'};
7565                $hash        ||= $diffinfo{'to_id'};
7566
7567                # non-textual hash id's can be cached
7568                if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7569                    $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7570                        $expires = '+1d';
7571                }
7572
7573                # open patch output
7574                open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7575                        '-p', ($format eq 'html' ? "--full-index" : ()),
7576                        $hash_parent_base, $hash_base,
7577                        "--", (defined $file_parent ? $file_parent : ()), $file_name
7578                        or die_error(500, "Open git-diff-tree failed");
7579        }
7580
7581        # old/legacy style URI -- not generated anymore since 1.4.3.
7582        if (!%diffinfo) {
7583                die_error('404 Not Found', "Missing one of the blob diff parameters")
7584        }
7585
7586        # header
7587        if ($format eq 'html') {
7588                my $formats_nav =
7589                        $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7590                                "raw");
7591                $formats_nav .= diff_style_nav($diff_style);
7592                git_header_html(undef, $expires);
7593                if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7594                        git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7595                        git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7596                } else {
7597                        print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7598                        print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7599                }
7600                if (defined $file_name) {
7601                        git_print_page_path($file_name, "blob", $hash_base);
7602                } else {
7603                        print "<div class=\"page_path\"></div>\n";
7604                }
7605
7606        } elsif ($format eq 'plain') {
7607                print $cgi->header(
7608                        -type => 'text/plain',
7609                        -charset => 'utf-8',
7610                        -expires => $expires,
7611                        -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7612
7613                print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7614
7615        } else {
7616                die_error(400, "Unknown blobdiff format");
7617        }
7618
7619        # patch
7620        if ($format eq 'html') {
7621                print "<div class=\"page_body\">\n";
7622
7623                git_patchset_body($fd, $diff_style,
7624                                  [ \%diffinfo ], $hash_base, $hash_parent_base);
7625                close $fd;
7626
7627                print "</div>\n"; # class="page_body"
7628                git_footer_html();
7629
7630        } else {
7631                while (my $line = <$fd>) {
7632                        $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7633                        $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7634
7635                        print $line;
7636
7637                        last if $line =~ m!^\+\+\+!;
7638                }
7639                local $/ = undef;
7640                print <$fd>;
7641                close $fd;
7642        }
7643}
7644
7645sub git_blobdiff_plain {
7646        git_blobdiff('plain');
7647}
7648
7649# assumes that it is added as later part of already existing navigation,
7650# so it returns "| foo | bar" rather than just "foo | bar"
7651sub diff_style_nav {
7652        my ($diff_style, $is_combined) = @_;
7653        $diff_style ||= 'inline';
7654
7655        return "" if ($is_combined);
7656
7657        my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7658        my %styles = @styles;
7659        @styles =
7660                @styles[ map { $_ * 2 } 0..$#styles/2 ];
7661
7662        return join '',
7663                map { " | ".$_ }
7664                map {
7665                        $_ eq $diff_style ? $styles{$_} :
7666                        $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7667                } @styles;
7668}
7669
7670sub git_commitdiff {
7671        my %params = @_;
7672        my $format = $params{-format} || 'html';
7673        my $diff_style = $input_params{'diff_style'} || 'inline';
7674
7675        my ($patch_max) = gitweb_get_feature('patches');
7676        if ($format eq 'patch') {
7677                die_error(403, "Patch view not allowed") unless $patch_max;
7678        }
7679
7680        $hash ||= $hash_base || "HEAD";
7681        my %co = parse_commit($hash)
7682            or die_error(404, "Unknown commit object");
7683
7684        # choose format for commitdiff for merge
7685        if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7686                $hash_parent = '--cc';
7687        }
7688        # we need to prepare $formats_nav before almost any parameter munging
7689        my $formats_nav;
7690        if ($format eq 'html') {
7691                $formats_nav =
7692                        $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7693                                "raw");
7694                if ($patch_max && @{$co{'parents'}} <= 1) {
7695                        $formats_nav .= " | " .
7696                                $cgi->a({-href => href(action=>"patch", -replay=>1)},
7697                                        "patch");
7698                }
7699                $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7700
7701                if (defined $hash_parent &&
7702                    $hash_parent ne '-c' && $hash_parent ne '--cc') {
7703                        # commitdiff with two commits given
7704                        my $hash_parent_short = $hash_parent;
7705                        if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7706                                $hash_parent_short = substr($hash_parent, 0, 7);
7707                        }
7708                        $formats_nav .=
7709                                ' (from';
7710                        for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7711                                if ($co{'parents'}[$i] eq $hash_parent) {
7712                                        $formats_nav .= ' parent ' . ($i+1);
7713                                        last;
7714                                }
7715                        }
7716                        $formats_nav .= ': ' .
7717                                $cgi->a({-href => href(-replay=>1,
7718                                                       hash=>$hash_parent, hash_base=>undef)},
7719                                        esc_html($hash_parent_short)) .
7720                                ')';
7721                } elsif (!$co{'parent'}) {
7722                        # --root commitdiff
7723                        $formats_nav .= ' (initial)';
7724                } elsif (scalar @{$co{'parents'}} == 1) {
7725                        # single parent commit
7726                        $formats_nav .=
7727                                ' (parent: ' .
7728                                $cgi->a({-href => href(-replay=>1,
7729                                                       hash=>$co{'parent'}, hash_base=>undef)},
7730                                        esc_html(substr($co{'parent'}, 0, 7))) .
7731                                ')';
7732                } else {
7733                        # merge commit
7734                        if ($hash_parent eq '--cc') {
7735                                $formats_nav .= ' | ' .
7736                                        $cgi->a({-href => href(-replay=>1,
7737                                                               hash=>$hash, hash_parent=>'-c')},
7738                                                'combined');
7739                        } else { # $hash_parent eq '-c'
7740                                $formats_nav .= ' | ' .
7741                                        $cgi->a({-href => href(-replay=>1,
7742                                                               hash=>$hash, hash_parent=>'--cc')},
7743                                                'compact');
7744                        }
7745                        $formats_nav .=
7746                                ' (merge: ' .
7747                                join(' ', map {
7748                                        $cgi->a({-href => href(-replay=>1,
7749                                                               hash=>$_, hash_base=>undef)},
7750                                                esc_html(substr($_, 0, 7)));
7751                                } @{$co{'parents'}} ) .
7752                                ')';
7753                }
7754        }
7755
7756        my $hash_parent_param = $hash_parent;
7757        if (!defined $hash_parent_param) {
7758                # --cc for multiple parents, --root for parentless
7759                $hash_parent_param =
7760                        @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7761        }
7762
7763        # read commitdiff
7764        my $fd;
7765        my @difftree;
7766        if ($format eq 'html') {
7767                open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7768                        "--no-commit-id", "--patch-with-raw", "--full-index",
7769                        $hash_parent_param, $hash, "--"
7770                        or die_error(500, "Open git-diff-tree failed");
7771
7772                while (my $line = <$fd>) {
7773                        chomp $line;
7774                        # empty line ends raw part of diff-tree output
7775                        last unless $line;
7776                        push @difftree, scalar parse_difftree_raw_line($line);
7777                }
7778
7779        } elsif ($format eq 'plain') {
7780                open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7781                        '-p', $hash_parent_param, $hash, "--"
7782                        or die_error(500, "Open git-diff-tree failed");
7783        } elsif ($format eq 'patch') {
7784                # For commit ranges, we limit the output to the number of
7785                # patches specified in the 'patches' feature.
7786                # For single commits, we limit the output to a single patch,
7787                # diverging from the git-format-patch default.
7788                my @commit_spec = ();
7789                if ($hash_parent) {
7790                        if ($patch_max > 0) {
7791                                push @commit_spec, "-$patch_max";
7792                        }
7793                        push @commit_spec, '-n', "$hash_parent..$hash";
7794                } else {
7795                        if ($params{-single}) {
7796                                push @commit_spec, '-1';
7797                        } else {
7798                                if ($patch_max > 0) {
7799                                        push @commit_spec, "-$patch_max";
7800                                }
7801                                push @commit_spec, "-n";
7802                        }
7803                        push @commit_spec, '--root', $hash;
7804                }
7805                open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7806                        '--encoding=utf8', '--stdout', @commit_spec
7807                        or die_error(500, "Open git-format-patch failed");
7808        } else {
7809                die_error(400, "Unknown commitdiff format");
7810        }
7811
7812        # non-textual hash id's can be cached
7813        my $expires;
7814        if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7815                $expires = "+1d";
7816        }
7817
7818        # write commit message
7819        if ($format eq 'html') {
7820                my $refs = git_get_references();
7821                my $ref = format_ref_marker($refs, $co{'id'});
7822
7823                git_header_html(undef, $expires);
7824                git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7825                git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7826                print "<div class=\"title_text\">\n" .
7827                      "<table class=\"object_header\">\n";
7828                git_print_authorship_rows(\%co);
7829                print "</table>".
7830                      "</div>\n";
7831                print "<div class=\"page_body\">\n";
7832                if (@{$co{'comment'}} > 1) {
7833                        print "<div class=\"log\">\n";
7834                        git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7835                        print "</div>\n"; # class="log"
7836                }
7837
7838        } elsif ($format eq 'plain') {
7839                my $refs = git_get_references("tags");
7840                my $tagname = git_get_rev_name_tags($hash);
7841                my $filename = basename($project) . "-$hash.patch";
7842
7843                print $cgi->header(
7844                        -type => 'text/plain',
7845                        -charset => 'utf-8',
7846                        -expires => $expires,
7847                        -content_disposition => 'inline; filename="' . "$filename" . '"');
7848                my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7849                print "From: " . to_utf8($co{'author'}) . "\n";
7850                print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7851                print "Subject: " . to_utf8($co{'title'}) . "\n";
7852
7853                print "X-Git-Tag: $tagname\n" if $tagname;
7854                print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7855
7856                foreach my $line (@{$co{'comment'}}) {
7857                        print to_utf8($line) . "\n";
7858                }
7859                print "---\n\n";
7860        } elsif ($format eq 'patch') {
7861                my $filename = basename($project) . "-$hash.patch";
7862
7863                print $cgi->header(
7864                        -type => 'text/plain',
7865                        -charset => 'utf-8',
7866                        -expires => $expires,
7867                        -content_disposition => 'inline; filename="' . "$filename" . '"');
7868        }
7869
7870        # write patch
7871        if ($format eq 'html') {
7872                my $use_parents = !defined $hash_parent ||
7873                        $hash_parent eq '-c' || $hash_parent eq '--cc';
7874                git_difftree_body(\@difftree, $hash,
7875                                  $use_parents ? @{$co{'parents'}} : $hash_parent);
7876                print "<br/>\n";
7877
7878                git_patchset_body($fd, $diff_style,
7879                                  \@difftree, $hash,
7880                                  $use_parents ? @{$co{'parents'}} : $hash_parent);
7881                close $fd;
7882                print "</div>\n"; # class="page_body"
7883                git_footer_html();
7884
7885        } elsif ($format eq 'plain') {
7886                local $/ = undef;
7887                print <$fd>;
7888                close $fd
7889                        or print "Reading git-diff-tree failed\n";
7890        } elsif ($format eq 'patch') {
7891                local $/ = undef;
7892                print <$fd>;
7893                close $fd
7894                        or print "Reading git-format-patch failed\n";
7895        }
7896}
7897
7898sub git_commitdiff_plain {
7899        git_commitdiff(-format => 'plain');
7900}
7901
7902# format-patch-style patches
7903sub git_patch {
7904        git_commitdiff(-format => 'patch', -single => 1);
7905}
7906
7907sub git_patches {
7908        git_commitdiff(-format => 'patch');
7909}
7910
7911sub git_history {
7912        git_log_generic('history', \&git_history_body,
7913                        $hash_base, $hash_parent_base,
7914                        $file_name, $hash);
7915}
7916
7917sub git_search {
7918        $searchtype ||= 'commit';
7919
7920        # check if appropriate features are enabled
7921        gitweb_check_feature('search')
7922                or die_error(403, "Search is disabled");
7923        if ($searchtype eq 'pickaxe') {
7924                # pickaxe may take all resources of your box and run for several minutes
7925                # with every query - so decide by yourself how public you make this feature
7926                gitweb_check_feature('pickaxe')
7927                        or die_error(403, "Pickaxe search is disabled");
7928        }
7929        if ($searchtype eq 'grep') {
7930                # grep search might be potentially CPU-intensive, too
7931                gitweb_check_feature('grep')
7932                        or die_error(403, "Grep search is disabled");
7933        }
7934
7935        if (!defined $searchtext) {
7936                die_error(400, "Text field is empty");
7937        }
7938        if (!defined $hash) {
7939                $hash = git_get_head_hash($project);
7940        }
7941        my %co = parse_commit($hash);
7942        if (!%co) {
7943                die_error(404, "Unknown commit object");
7944        }
7945        if (!defined $page) {
7946                $page = 0;
7947        }
7948
7949        if ($searchtype eq 'commit' ||
7950            $searchtype eq 'author' ||
7951            $searchtype eq 'committer') {
7952                git_search_message(%co);
7953        } elsif ($searchtype eq 'pickaxe') {
7954                git_search_changes(%co);
7955        } elsif ($searchtype eq 'grep') {
7956                git_search_files(%co);
7957        } else {
7958                die_error(400, "Unknown search type");
7959        }
7960}
7961
7962sub git_search_help {
7963        git_header_html();
7964        git_print_page_nav('','', $hash,$hash,$hash);
7965        print <<EOT;
7966<p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7967regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7968the pattern entered is recognized as the POSIX extended
7969<a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7970insensitive).</p>
7971<dl>
7972<dt><b>commit</b></dt>
7973<dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7974EOT
7975        my $have_grep = gitweb_check_feature('grep');
7976        if ($have_grep) {
7977                print <<EOT;
7978<dt><b>grep</b></dt>
7979<dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7980    a different one) are searched for the given pattern. On large trees, this search can take
7981a while and put some strain on the server, so please use it with some consideration. Note that
7982due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7983case-sensitive.</dd>
7984EOT
7985        }
7986        print <<EOT;
7987<dt><b>author</b></dt>
7988<dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7989<dt><b>committer</b></dt>
7990<dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7991EOT
7992        my $have_pickaxe = gitweb_check_feature('pickaxe');
7993        if ($have_pickaxe) {
7994                print <<EOT;
7995<dt><b>pickaxe</b></dt>
7996<dd>All commits that caused the string to appear or disappear from any file (changes that
7997added, removed or "modified" the string) will be listed. This search can take a while and
7998takes a lot of strain on the server, so please use it wisely. Note that since you may be
7999interested even in changes just changing the case as well, this search is case sensitive.</dd>
8000EOT
8001        }
8002        print "</dl>\n";
8003        git_footer_html();
8004}
8005
8006sub git_shortlog {
8007        git_log_generic('shortlog', \&git_shortlog_body,
8008                        $hash, $hash_parent);
8009}
8010
8011## ......................................................................
8012## feeds (RSS, Atom; OPML)
8013
8014sub git_feed {
8015        my $format = shift || 'atom';
8016        my $have_blame = gitweb_check_feature('blame');
8017
8018        # Atom: http://www.atomenabled.org/developers/syndication/
8019        # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
8020        if ($format ne 'rss' && $format ne 'atom') {
8021                die_error(400, "Unknown web feed format");
8022        }
8023
8024        # log/feed of current (HEAD) branch, log of given branch, history of file/directory
8025        my $head = $hash || 'HEAD';
8026        my @commitlist = parse_commits($head, 150, 0, $file_name);
8027
8028        my %latest_commit;
8029        my %latest_date;
8030        my $content_type = "application/$format+xml";
8031        if (defined $cgi->http('HTTP_ACCEPT') &&
8032                 $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
8033                # browser (feed reader) prefers text/xml
8034                $content_type = 'text/xml';
8035        }
8036        if (defined($commitlist[0])) {
8037                %latest_commit = %{$commitlist[0]};
8038                my $latest_epoch = $latest_commit{'committer_epoch'};
8039                exit_if_unmodified_since($latest_epoch);
8040                %latest_date = parse_date($latest_epoch, $latest_commit{'committer_tz'});
8041        }
8042        print $cgi->header(
8043                -type => $content_type,
8044                -charset => 'utf-8',
8045                %latest_date ? (-last_modified => $latest_date{'rfc2822'}) : (),
8046                -status => '200 OK');
8047
8048        # Optimization: skip generating the body if client asks only
8049        # for Last-Modified date.
8050        return if ($cgi->request_method() eq 'HEAD');
8051
8052        # header variables
8053        my $title = "$site_name - $project/$action";
8054        my $feed_type = 'log';
8055        if (defined $hash) {
8056                $title .= " - '$hash'";
8057                $feed_type = 'branch log';
8058                if (defined $file_name) {
8059                        $title .= " :: $file_name";
8060                        $feed_type = 'history';
8061                }
8062        } elsif (defined $file_name) {
8063                $title .= " - $file_name";
8064                $feed_type = 'history';
8065        }
8066        $title .= " $feed_type";
8067        $title = esc_html($title);
8068        my $descr = git_get_project_description($project);
8069        if (defined $descr) {
8070                $descr = esc_html($descr);
8071        } else {
8072                $descr = "$project " .
8073                         ($format eq 'rss' ? 'RSS' : 'Atom') .
8074                         " feed";
8075        }
8076        my $owner = git_get_project_owner($project);
8077        $owner = esc_html($owner);
8078
8079        #header
8080        my $alt_url;
8081        if (defined $file_name) {
8082                $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
8083        } elsif (defined $hash) {
8084                $alt_url = href(-full=>1, action=>"log", hash=>$hash);
8085        } else {
8086                $alt_url = href(-full=>1, action=>"summary");
8087        }
8088        print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
8089        if ($format eq 'rss') {
8090                print <<XML;
8091<rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
8092<channel>
8093XML
8094                print "<title>$title</title>\n" .
8095                      "<link>$alt_url</link>\n" .
8096                      "<description>$descr</description>\n" .
8097                      "<language>en</language>\n" .
8098                      # project owner is responsible for 'editorial' content
8099                      "<managingEditor>$owner</managingEditor>\n";
8100                if (defined $logo || defined $favicon) {
8101                        # prefer the logo to the favicon, since RSS
8102                        # doesn't allow both
8103                        my $img = esc_url($logo || $favicon);
8104                        print "<image>\n" .
8105                              "<url>$img</url>\n" .
8106                              "<title>$title</title>\n" .
8107                              "<link>$alt_url</link>\n" .
8108                              "</image>\n";
8109                }
8110                if (%latest_date) {
8111                        print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
8112                        print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
8113                }
8114                print "<generator>gitweb v.$version/$git_version</generator>\n";
8115        } elsif ($format eq 'atom') {
8116                print <<XML;
8117<feed xmlns="http://www.w3.org/2005/Atom">
8118XML
8119                print "<title>$title</title>\n" .
8120                      "<subtitle>$descr</subtitle>\n" .
8121                      '<link rel="alternate" type="text/html" href="' .
8122                      $alt_url . '" />' . "\n" .
8123                      '<link rel="self" type="' . $content_type . '" href="' .
8124                      $cgi->self_url() . '" />' . "\n" .
8125                      "<id>" . href(-full=>1) . "</id>\n" .
8126                      # use project owner for feed author
8127                      "<author><name>$owner</name></author>\n";
8128                if (defined $favicon) {
8129                        print "<icon>" . esc_url($favicon) . "</icon>\n";
8130                }
8131                if (defined $logo) {
8132                        # not twice as wide as tall: 72 x 27 pixels
8133                        print "<logo>" . esc_url($logo) . "</logo>\n";
8134                }
8135                if (! %latest_date) {
8136                        # dummy date to keep the feed valid until commits trickle in:
8137                        print "<updated>1970-01-01T00:00:00Z</updated>\n";
8138                } else {
8139                        print "<updated>$latest_date{'iso-8601'}</updated>\n";
8140                }
8141                print "<generator version='$version/$git_version'>gitweb</generator>\n";
8142        }
8143
8144        # contents
8145        for (my $i = 0; $i <= $#commitlist; $i++) {
8146                my %co = %{$commitlist[$i]};
8147                my $commit = $co{'id'};
8148                # we read 150, we always show 30 and the ones more recent than 48 hours
8149                if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
8150                        last;
8151                }
8152                my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
8153
8154                # get list of changed files
8155                open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
8156                        $co{'parent'} || "--root",
8157                        $co{'id'}, "--", (defined $file_name ? $file_name : ())
8158                        or next;
8159                my @difftree = map { chomp; $_ } <$fd>;
8160                close $fd
8161                        or next;
8162
8163                # print element (entry, item)
8164                my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
8165                if ($format eq 'rss') {
8166                        print "<item>\n" .
8167                              "<title>" . esc_html($co{'title'}) . "</title>\n" .
8168                              "<author>" . esc_html($co{'author'}) . "</author>\n" .
8169                              "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
8170                              "<guid isPermaLink=\"true\">$co_url</guid>\n" .
8171                              "<link>$co_url</link>\n" .
8172                              "<description>" . esc_html($co{'title'}) . "</description>\n" .
8173                              "<content:encoded>" .
8174                              "<![CDATA[\n";
8175                } elsif ($format eq 'atom') {
8176                        print "<entry>\n" .
8177                              "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
8178                              "<updated>$cd{'iso-8601'}</updated>\n" .
8179                              "<author>\n" .
8180                              "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
8181                        if ($co{'author_email'}) {
8182                                print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
8183                        }
8184                        print "</author>\n" .
8185                              # use committer for contributor
8186                              "<contributor>\n" .
8187                              "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
8188                        if ($co{'committer_email'}) {
8189                                print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
8190                        }
8191                        print "</contributor>\n" .
8192                              "<published>$cd{'iso-8601'}</published>\n" .
8193                              "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
8194                              "<id>$co_url</id>\n" .
8195                              "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
8196                              "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
8197                }
8198                my $comment = $co{'comment'};
8199                print "<pre>\n";
8200                foreach my $line (@$comment) {
8201                        $line = esc_html($line);
8202                        print "$line\n";
8203                }
8204                print "</pre><ul>\n";
8205                foreach my $difftree_line (@difftree) {
8206                        my %difftree = parse_difftree_raw_line($difftree_line);
8207                        next if !$difftree{'from_id'};
8208
8209                        my $file = $difftree{'file'} || $difftree{'to_file'};
8210
8211                        print "<li>" .
8212                              "[" .
8213                              $cgi->a({-href => href(-full=>1, action=>"blobdiff",
8214                                                     hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
8215                                                     hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
8216                                                     file_name=>$file, file_parent=>$difftree{'from_file'}),
8217                                      -title => "diff"}, 'D');
8218                        if ($have_blame) {
8219                                print $cgi->a({-href => href(-full=>1, action=>"blame",
8220                                                             file_name=>$file, hash_base=>$commit),
8221                                              -title => "blame"}, 'B');
8222                        }
8223                        # if this is not a feed of a file history
8224                        if (!defined $file_name || $file_name ne $file) {
8225                                print $cgi->a({-href => href(-full=>1, action=>"history",
8226                                                             file_name=>$file, hash=>$commit),
8227                                              -title => "history"}, 'H');
8228                        }
8229                        $file = esc_path($file);
8230                        print "] ".
8231                              "$file</li>\n";
8232                }
8233                if ($format eq 'rss') {
8234                        print "</ul>]]>\n" .
8235                              "</content:encoded>\n" .
8236                              "</item>\n";
8237                } elsif ($format eq 'atom') {
8238                        print "</ul>\n</div>\n" .
8239                              "</content>\n" .
8240                              "</entry>\n";
8241                }
8242        }
8243
8244        # end of feed
8245        if ($format eq 'rss') {
8246                print "</channel>\n</rss>\n";
8247        } elsif ($format eq 'atom') {
8248                print "</feed>\n";
8249        }
8250}
8251
8252sub git_rss {
8253        git_feed('rss');
8254}
8255
8256sub git_atom {
8257        git_feed('atom');
8258}
8259
8260sub git_opml {
8261        my @list = git_get_projects_list($project_filter, $strict_export);
8262        if (!@list) {
8263                die_error(404, "No projects found");
8264        }
8265
8266        print $cgi->header(
8267                -type => 'text/xml',
8268                -charset => 'utf-8',
8269                -content_disposition => 'inline; filename="opml.xml"');
8270
8271        my $title = esc_html($site_name);
8272        my $filter = " within subdirectory ";
8273        if (defined $project_filter) {
8274                $filter .= esc_html($project_filter);
8275        } else {
8276                $filter = "";
8277        }
8278        print <<XML;
8279<?xml version="1.0" encoding="utf-8"?>
8280<opml version="1.0">
8281<head>
8282  <title>$title OPML Export$filter</title>
8283</head>
8284<body>
8285<outline text="git RSS feeds">
8286XML
8287
8288        foreach my $pr (@list) {
8289                my %proj = %$pr;
8290                my $head = git_get_head_hash($proj{'path'});
8291                if (!defined $head) {
8292                        next;
8293                }
8294                $git_dir = "$projectroot/$proj{'path'}";
8295                my %co = parse_commit($head);
8296                if (!%co) {
8297                        next;
8298                }
8299
8300                my $path = esc_html(chop_str($proj{'path'}, 25, 5));
8301                my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
8302                my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
8303                print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
8304        }
8305        print <<XML;
8306</outline>
8307</body>
8308</opml>
8309XML
8310}